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Posts By: Daniel Midson-Short

How Much Does It Cost to Replace a Furnace in Orange County in 2026?

Posted by & filed under Furnace Repair, Heating, HVAC.

Quick answer: Furnace replacement cost in Orange County comes down to five things. System size, efficiency rating, fuel type, the condition of your existing ductwork, and how difficult the install location is. Get a written quote that itemizes all five. A quote without that breakdown tells you nothing useful.

Why It’s Hard to Get a Definite Number

You searched for a price for your HVAC furnace. Instead of straight answers, you get price ranges so wide they’re useless.

That’s frustrating, and it feels like HVAC contractors are hiding something.

Most of the time they aren’t. A furnace quote depends on variables that live inside your specific house. Anyone quoting a firm price without seeing it is guessing.

Here’s what makes August the right month to ask anyway. Heating season in Orange County starts in earnest around November.

Replacing a furnace in August means you choose on your terms. You compare quotes, check availability, and pick equipment without a cold house forcing your hand.

Wait until the first cold snap and you’re buying under pressure, from whoever can come out fastest.

In this article, we’ll break down what actually drives the cost. Then we’ll cover when repair still beats replacement.

The Five Things That Drive Your Quote

Every legitimate furnace quote prices these five variables.

  • System size. Measured in BTUs, sized to your home’s heat load. Not square footage alone. Insulation, window area, and ceiling height all move the number.
  • Efficiency rating. Expressed as AFUE, the percentage of fuel converted to usable heat. Higher AFUE costs more upfront and less to run.
  • Fuel type. Gas, electric, or a heat pump. Each carries different equipment and installation costs.
  • Ductwork condition. If your ducts leak or are undersized, a new furnace won’t fix comfort problems. Duct repair belongs in the quote.
  • Install difficulty. Attic and crawlspace installs cost more than a garage or closet. Access drives labor hours.

A quote that lists a single lump sum hides all five. Ask for the breakdown.

Ductwork deserves particular attention. ENERGY STAR reports that sealing and insulating ducts improves system efficiency by as much as 20 percent.

It also warns that improper installation reduces efficiency by up to 30 percent. Who installs your furnace matters as much as which furnace you buy.

Cost Breakdown by Furnace Type

Your final price shifts with the efficiency rating (AFUE) and the type of heating element you choose. Here is how the common options compare in Orange County.

Furnace TypeEfficiency (AFUE)Typical Installed Cost
Standard Gas Furnace80% AFUE$3,000 to $6,500
High-Efficiency Gas Furnace95%+ AFUE$7,500 to $10,000
Electric FurnaceN/A$2,000 to $4,000
Full HVAC System (Furnace + AC)Varies$9,500 to $15,500+

A standard gas furnace at 80% AFUE is the most common entry-level replacement in Southern California’s milder climate. A high-efficiency gas furnace at 95% or higher adds a secondary heat exchanger. That pulls more heat from the same fuel. An electric furnace costs less upfront, but runs more expensively given Orange County’s high electricity rates. A full system that pairs a new furnace with a new AC runs highest. A 3-ton standard combo for a 1,200 to 1,800 square foot home averages $9,500 to $13,500.

Why the 2028 Efficiency Rule Changes Your Math

This is the piece of the puzzle most homeowners haven’t heard about.

The U.S. Department of Energy has finalized a standard requiring 95 percent AFUE for residential gas furnaces. It takes effect in late 2028.

DOE projects the standard will save American households $1.5 billion annually, and $24.8 billion over 30 years.

What that means for you is simple. High-efficiency condensing furnaces are becoming the baseline, not the upgrade.

Buying a low-efficiency furnace in 2026 means buying equipment the market is moving away from. Parts availability and resale value both follow the standard.

Condensing furnaces do need a condensate drain and different venting. That’s an installation cost worth understanding before you compare quotes.

What the Installation Actually Involves

A straightforward furnace replacement usually takes a day.

The HVAC technician removes the old unit and sets the new one. Then comes the gas and electrical connection, the plenum and venting, and commissioning.

Where it stretches longer: switching from a standard to a condensing furnace, since venting and drainage change. Attic installs with difficult access also add hours.

Permits and inspection apply in most Orange County cities. A quote that skips permit costs is incomplete.

You can review Thomson’s furnace replacement service for what a full replacement covers.

When Furnace Repair Still Beats Replacement

Replacement isn’t automatic. Repair often makes better financial sense.

Repair usually wins on three conditions. The furnace is under 12 years old. The failed part is a common one, like an igniter or flame sensor. The system has been maintained.

Replacement usually wins past 15 years, or when the heat exchanger is cracked. It also wins when repair costs approach half the price of new equipment.

A cracked heat exchanger is the one non-negotiable. That’s a carbon monoxide risk, and it means replacement regardless of age.

If your furnace is simply old but working, you have time. Book a heating inspection now and make the decision with data instead of urgency. Thomson’s heating services page covers what an inspection includes.

Frequently Asked Questions

How long does a furnace last? Most gas furnaces run 15 to 20 years with regular maintenance. Past 15 years, plan for replacement rather than reacting to a failure.

Does a new furnace lower my energy bill? Usually. ENERGY STAR estimates that swapping old equipment for certified equipment cuts an annual energy bill by nearly $140. The figure varies by region.

What is AFUE? Annual Fuel Utilization Efficiency. It’s the percentage of fuel your furnace converts into usable heat. A 95 AFUE furnace turns 95 percent of the fuel into heat.

Should I replace my furnace and AC at the same time? Often yes, if both are near end of life. They share the blower and ductwork, so replacing together avoids paying twice for overlapping labor.

Do I need a permit to replace a furnace in Orange County? Yes, in most cities. A licensed contractor pulls the permit and schedules inspection as part of the job.

Is it cheaper to replace a furnace in summer? Scheduling is easier and appointment windows are wider before heating season. Booking in late summer avoids the November rush.

Getting a Real Number for Your Home

There’s no honest single price for furnace replacement. There is an honest process for getting one.

Have an HVAC technician calculate your actual heat load, inspect your ductwork, and look at the install location. Then ask for a written furnace replacement quote itemizing equipment, labor, venting, and permits.

Then compare quotes on those line items rather than on the bottom line alone.

With the 95 AFUE standard arriving in late 2028, the efficiency question is worth taking seriously now.

Call Thomson Air Conditioning at (562) 201-3014 to book an Orange County furnace replacement quote for your home.

Ductless Mini-Splits For Older Seal Beach Homes Without Adding Ductwork

Posted by & filed under Air Conditioning, Air Conditioning Services, HVAC.

Quick answer: A ductless mini-split cools rooms in a Seal Beach home without any ductwork. An outdoor compressor connects to indoor units through a three-inch wall opening. That suits older Seal Beach homes, room additions, converted garages, and any space central AC never reached.

The Room That Never Gets Cool

Every older Seal Beach home has one.

The back bedroom that sits five degrees warmer than the rest of the house. Maybe it’s a converted garage that heats up in August. Or an upstairs addition that slowly turns into an oven by 3pm.

You’ve tried the obvious fixes: closing vents elsewhere, running the AC system harder, or maybe an additional box fan in the doorway.

None of it seemingly works, and now you’re cooling the whole house to fix one room.

Here’s why that happens. Many older homes near the coast were built before central air was standard. Ductwork got added later, squeezed through whatever cavities existed, or never reached certain rooms at all.

Tearing open walls to run new ducts is expensive and disruptive. For a lot of these homes, it isn’t the right answer anyway.

In this article, we’ll cover how ductless mini-splits solve this problem. Then we’ll look at what installation involves and whether one fits your home.

What a Ductless Mini-Split Actually Is

A mini-split has two parts. An outdoor compressor unit, and one or more indoor air handlers mounted on a wall or ceiling.

They connect through a small opening, usually about three inches wide. Refrigerant lines, a power cable, and a condensate drain run through it.

That’s the whole installation. No ducts, no soffits, no torn-open ceilings.

Each indoor unit has its own thermostat. So the back bedroom runs at 70 while the living room sits at 76.

Modern systems also heat. A mini-split is a heat pump, which matters in Seal Beach. Winters here are mild, not warm.

ENERGY STAR notes that nearly half the energy used in a home goes to heating and cooling. Getting that half right is where the savings live.

Where Ducted Systems Lose Their Energy

This is the part most homeowners have never been told.

The U.S. Department of Energy’s Building America program puts it plainly. Duct losses “can account for more than 30% of heating and cooling energy consumption” when ducts run through unconditioned space.

Attics. Crawlspaces. Garages.

That’s where most retrofitted ductwork in older coastal homes ends up.

So nearly a third of what you pay to cool your home can vanish before the air reaches a room. A ductless system skips that loss entirely. There are no ducts to leak through.

ENERGY STAR adds two figures worth knowing. Sealing and insulating ducts improves system efficiency by as much as 20 percent. Improper installation cuts efficiency by up to 30 percent.

Both point the same direction. In a ducted system, the ducts decide how much of your money reaches the room.

The efficiency numbers back this up. The same DOE resource notes mini-splits are now available above 22 HSPF2 for heating and above 35 SEER2 for cooling.

Those are strong ratings for residential equipment.

What Installation Involves

Most single-room installations finish in a day.

The work breaks down like this:

  • Siting the outdoor unit. It needs a level pad or wall bracket, clearance for airflow, and a sensible run to the indoor unit.
  • Mounting the indoor head. High on an interior or exterior wall, positioned for even airflow across the room.
  • Drilling the line-set opening. A single opening, sealed and sleeved.
  • Running the line set. Refrigerant lines, control wiring, and the condensate drain, either concealed in a slim exterior channel or run through the wall.
  • Commissioning. Vacuum the lines, charge the system, test the heating and cooling modes.

A multi-zone system takes longer, since one outdoor unit serves several indoor heads.

Explore Thomson’s ductless mini-split service to see how these systems get specified.

Who Should Consider a Mini-Split

A ductless system makes clear sense in a few situations.

You have a room addition, converted garage, or attic conversion with no ducts reaching it. You have one or two rooms that never balance with the rest of the house. You want to stop cooling empty rooms to keep one comfortable.

It also fits homes where the existing AC system works fine everywhere except a stubborn corner.

Where a mini-split fits less well: a home with sound ductwork throughout and a system that simply needs replacing. In that case a straight central replacement is usually the better value.

The honest test is whether your ducts are the problem. If they are, a mini-split solves it. If they aren’t, it’s an expensive way to fix something else.

Frequently Asked Questions

Do ductless mini-splits also provide heat? Yes. Modern mini-splits are heat pumps, so they heat and cool from the same equipment. That suits mild Seal Beach winters well.

How many indoor units do I need? One per zone you want to control separately. A single room needs one head. A whole-home system typically uses one head per main living area.

Are mini-splits noisy? The indoor head is quiet, usually quieter than a refrigerator. The compressor sits outside, so most of the noise stays out of the house.

Do mini-splits work in older homes without insulation? Yes, though performance improves with insulation. A proper load calculation sizes the unit for how your home actually performs.

How long does a mini-split installation take? Most single-room installs finish in one day. Multi-zone systems take longer, depending on the number of indoor heads.

Getting Comfortable Without Tearing Up Your SEAL BEACH Home

That one hot room isn’t a mystery. It’s usually a ductwork problem, and in older Seal Beach homes ductwork is often the hardest thing to fix.

A ductless mini-split works around it. No new ducts. A three-inch opening. Independent temperature control, without the duct losses that eat up to 30% of a ducted system’s energy.

Thomson Air Conditioning installs ductless systems across Seal Beach, Huntington Beach, and the surrounding Orange County communities. You’ll find all ways our team can help you on the Seal Beach AC services page.

Need help with your Seal Beach home AC? Thomson Air Conditioning at (562) 201-3014 to book a ductless assessment for your home.

A Guide to Air Conditioning Repair in Fountain Valley

Posted by & filed under AC Repair, Air Conditioning, Air Conditioning Services.

Quick answer: When your AC stops cooling in Fountain Valley, check three things first. Replace a dirty filter, confirm the thermostat is set to cool, and reset the breaker. If the unit still runs warm, freezes over, or won’t start, call an HVAC technician. Peak-summer repair slots fill quickly so it’s better to get a repair or maintenance early.

Avoid the Hot Afternoon WHEN Your AC Gives Up

Picture this: it’s late August in Fountain Valley. The temperature outside is topping 90 degrees. The house is closed up to stay cool, the AC has been running all day, and something changes.

For some reason, the air coming from the AC vents feels lukewarm.

You check the thermostat. It says 74. The hallway says otherwise.

Every Orange County homeowner knows this feeling. The system isn’t dead, exactly. It’s running, humming, using power, and cooling nothing.

Here’s what makes late summer different. Your air conditioner has now worked hard for four straight months.

Small faults that stayed hidden in June finally tip the system over. A slightly low refrigerant charge. A dirty coil.

Ignoring it gets expensive fast. A struggling AC unit draws more power every day it runs. Left long enough, a minor airflow issue becomes a frozen evaporator coil, then a failed compressor.

In this article, we’ll cover what usually goes wrong and what you can check yourself. Then we’ll look at when the problem needs a professional.

Why Air Conditioners Fail Most Often in Late Summer

Cooling equipment fails when it’s worked hardest. That’s late July through September in Fountain Valley.

The U.S. Department of Energy lists the most common AC problems. They are refrigerant leaks, electrical control failure, sensor issues, drainage problems, and dirty filters.

Nearly all of them get worse with runtime.

Two-thirds of American homes have air conditioning. Homeowners spend around $11 billion a year powering those systems.

Here’s the part most people miss. A system rarely fails all at once.

The AC system degrades. Airflow drops a little. The compressor works a little harder. Your power bill creeps up for weeks before the cooling actually stops.

ENERGY STAR reports that airflow problems alone reduce a system’s efficiency by up to 15 percent. You pay for that inefficiency long before you feel the discomfort.

One misconception is worth correcting. Many homeowners assume refrigerant gets “used up” like fuel.

Refrigerant doesn’t. A sealed system holds its charge indefinitely. So if your refrigerant is low, you have a leak. Topping it off without finding that leak only delays the same repair.

What to Check Before You Call

Some late-summer AC problems have simple fixes. Run through these first:

  • Replace the air filter. A clogged filter restricts airflow and is the single most common cause of poor cooling. The Department of Energy notes that filter maintenance lowers energy consumption by 5 to 15 percent.
  • Check the thermostat. Confirm it’s set to cool, and that the fan is on auto rather than on.
  • Reset the breaker. AC units draw heavy current in peak heat and sometimes trip a breaker.
  • Clear the outdoor unit. Pull back plants and debris so the condenser can breathe. Give it two feet of clearance on all sides.

If the AC system cools normally after these steps, you’re done.

When to Call aN AC Technician Instead

Some symptoms point to problems that get worse with DIY attempts. Book professional air conditioning repair in Fountain Valley when you notice any of these:

  • Ice on the refrigerant lines or coil. Airflow or refrigerant is wrong, and running the system frozen strains the compressor.
  • Grinding or squealing from the unit. Usually a motor bearing or blower problem.
  • A burning smell near the air handler. Shut the system off at the breaker and call the same day.
  • Water pooling around the indoor unit. The condensate drain is blocked.
  • Short-cycling every few minutes. The system starts and stops without completing a cooling cycle.

Ice is the one to act on quickly. Turn the AC system off, switch the fan to on so the coil thaws, then book the repair.

Most straightforward repairs finish in under two hours. A capacitor replacement or a clogged drain line falls in that range.

Refrigerant leak work takes longer, because finding the leak is the real job.

Why Timing Your AC Repair Call Matters

Late summer is the busiest stretch of the year for every HVAC company in Orange County.

A call placed Monday morning gets a faster slot. The same call on a Friday afternoon, mid heat wave, does not.

If your system is cooling but struggling, book it now rather than waiting for a full failure. You’ll get a better appointment window. A small repair also costs far less than an emergency one.

Thomson Air Conditioning serves Fountain Valley as part of its regular Orange County service area. That area also covers Huntington Beach, Seal Beach, Costa Mesa, Newport Beach, and Los Alamitos.

You can see the full range of HVAC services in Fountain Valley on our site.

Frequently Asked Questions

Why is my AC running but not cooling? The usual causes are a clogged filter, a dirty condenser coil, low refrigerant from a leak, or a failing capacitor. Start with the filter. Call a technician if the problem continues.

Why is my air conditioner freezing up? Ice forms when airflow drops or refrigerant is low. Turn the AC system off, run the fan to thaw the coil, and book a repair. Running it frozen risks compressor damage.

How long does AC repair usually take? Most common repairs finish in under two hours. Refrigerant leak repairs take longer, since locating the leak is the time-consuming part.

Should I repair or replace my air conditioner? Repair usually makes sense for systems under 10 years old. For older units facing a major repair like a compressor or coil, replacement is often the better value.

Do I need to be home during an AC repair? Yes. A technician needs access to both the indoor air handler and the outdoor condenser to diagnose the system properly.

Getting Your Fountain Valley Home CoOL Again

A late-summer AC failure rarely happens without warning. Weak airflow, rising power bills, and a system that runs constantly are all early signals.

Check the filter, the thermostat, the breaker, and the clearance around the outdoor unit.

If those don’t solve it, bring in a technician. Ice, grinding, or a burning smell all mean the same thing: call before the compressor takes the damage.

Call Thomson Air Conditioning at (562) 201-3014 to book your air conditioning repair in Fountain Valley today.

Is Your Smart Thermostat Actually Costing You Money?

Posted by & filed under Air Conditioning, Air Conditioning Services.

Smart thermostats have become one of the most popular home upgrades for improving comfort and reducing energy costs.

But while smart thermostats are packed with helpful features, one setting in particular can sometimes work against you: learning mode.

At Thomson Air Conditioning, we install smart thermostats every day, and one of the most common misconceptions we hear is that a learning thermostat will always save money automatically. In reality, that’s not always the case.

How Learning Thermostats Work

Learning thermostats are designed to observe your daily routine and automatically create a schedule based on your habits. Over time, they adjust when your heating or air conditioning turns on and off without requiring you to program it yourself.

When your routine is consistent, this feature can be incredibly convenient.

However, if your schedule changes often, learning mode can begin creating a schedule that no longer matches how you actually live.

When Learning Mode Can Increase Your Energy Bills

Imagine you normally leave for work every weekday, so your thermostat is programmed to keep the house comfortable only when you’re home.

One afternoon, you come home early for lunch or to grab something from the house. A learning thermostat may interpret that as part of your new routine and begin cooling or heating your home at that same time every day, even when you’re not there.

Over time, those unnecessary heating and cooling cycles can increase your energy usage without you realizing it.

Temporary Changes Can Become Permanent

The same thing can happen when:

  • You have family or guests staying with you.
  • You work from home for a few days.
  • Your vacation or holiday schedule changes.
  • Someone manually adjusts the temperature several times.

A learning thermostat may assume these temporary behaviors are permanent and modify its schedule accordingly.

The Best Way to Use a Smart Thermostat

Smart thermostats are excellent tools, but they work best when you stay in control.


If your thermostat offers a learning feature, allow it to learn your routine for a short period if you’d like, then review the schedule it created. Once you’re happy with it, consider turning off automatic learning so your schedule doesn’t continue changing every time your routine varies.

This gives you the convenience of automation while keeping your home’s comfort and energy efficiency predictable.

Need Help Choosing the Right Thermostat?

Not every home needs the same thermostat. The best choice depends on your HVAC system, your family’s schedule, and the features you’ll actually use.

At Thomson Air Conditioning, we help homeowners throughout Huntington Beach and Orange County choose, install, and optimize smart thermostats that improve comfort without wasting energy.

If you’re thinking about upgrading your thermostat or have questions about your current AC system, reach out to Thomson Air Conditioning today. We’re happy to help you find the right solution for your home.

Air Conditioning Maintenance in Newport Beach: Stay Cool All Summer

Posted by & filed under Air Conditioner, Air Conditioning, Air Conditioning Services, HVAC.

For most of the year (and sometimes many years) your AC seems fine. You turn it on, it works, and the house cools down. So you leave it alone, assuming that everything is fine.

That’s how most Newport Beach homeowners treat their AC unit. Out of sight, out of mind, until the day it stops on a random 89-degree afternoon.

But here’s what you can’t see underneath the hood. Dust slowly builds up on the coils. A small refrigerant leak can gradually reduce cooling performance. The drain line collects debris. Each issue slowly but surely chips away at performance.

Of course, you don’t notice because it happens gradually. Your electricity bills creep up. The house takes slightly longer to cool. The AC system makes different noises than in years before.

This slow decline of your Newport Beach AC system is the real cost of skipped maintenance. In this article, we’ll explore what a tune-up includes and why it saves you money. We’ll also show you how to stay cool all summer.

Why Skipped AC Maintenance Costs You More Than You Think

A tune-up feels easy to skip. The AC works, so why pay for service?

The numbers tell a different story. According to the U.S. Department of Energy, neglecting necessary maintenance can reduce air-conditioning performance while regular maintenance helps the system operate effectively.

That lost efficiency shows up on every electric bill. In Newport Beach, summer cooling costs add up fast. Even a modest efficiency loss can increase cooling costs over time.

There’s a bigger cost too. The Department of Energy recommends regular maintenance to help air-conditioning systems operate effectively.

Skipping maintenance can allow small performance issues to go unnoticed until they become more disruptive.

Then there’s comfort. A tuned AC keeps your home steady through a heat wave. The CDC reports that heat is the leading weather-related cause of death. A dependable AC is your first line of defense at home.

Coastal Newport Beach makes AC maintenance matter even more. Salty ocean air corrodes outdoor coils and electrical parts faster than inland air does. That extra wear is exactly what a yearly tune-up is built to catch.

What an AC Tune-Up in Newport Beach Actually Includes

A real air conditioning tune-up for your Newport Beach home goes far beyond a filter swap. A licensed HVAC technician inspects, cleans, and tests your whole system.

Here’s what a thorough visit covers:

  • Refrigerant check. Low refrigerant can cause weak cooling and frozen coils and may indicate a leak.
  • Coil cleaning. Dirty condenser coils force the system to work harder for less cooling.
  • Electrical inspection. Capacitors and contactors wear out faster in salty coastal air.
  • Drain line clearing. A clogged condensate line can cause water problems or an AC shutdown.
  • Thermostat calibration. A small miscalibration wastes energy on every cooling cycle.
  • Airflow and blower test. Weak airflow strains the compressor and shortens its lifespan.

Visit length depends on the system and its condition. The ENERGY STAR program recommends annual pre-season checkups by a professional contractor.

Most of these checks happen out of sight. That’s exactly why their value is so easy to underestimate.

You can handle one piece yourself between visits. Swap your air filter every 1 to 3 months during cooling season. A clean filter protects airflow and keeps the blower from straining.

Everything else needs trained hands and proper tools. Refrigerant and electrical work are jobs for a licensed technician, not a weekend project.

When to Schedule AC Maintenance in Newport Beach


Timing matters when planning AC maintenance.

Maintenance needs and costs vary by system type, condition, accessibility, and service scope. Thomson AC can review your equipment and explain the recommended work before service begins.

Finding wear or performance issues during planned maintenance can give you more time to understand your options before an urgent breakdown.

Timing is the other half. The best time to service your AC is spring or early summer, before the heat peaks. Once temperatures climb, service calendars can fill and breakdowns become more disruptive.


Explore Thomson AC’s residential HVAC maintenance plan hub to learn about ongoing maintenance options for your home.

Our Newport Beach HVAC team handles maintenance across Newport Beach and the rest of coastal Orange County.

Planned maintenance can make it easier to keep routine HVAC care on your household calendar and address recommendations before peak cooling demand.

Keep Your Newport Beach Home Cool All Summer Long

Skipped maintenance is a quiet problem with a loud ending. Lost efficiency, higher bills, and a breakdown at the worst possible moment.

The fix is simple and affordable. Regular professional maintenance can help your AC operate effectively and reduce the chance that developing issues go unnoticed.

If you’re in Newport Beach, Costa Mesa, or anywhere across Orange County, Thomson Air Conditioning is ready to help. Our licensed technicians have served local homeowners for decades and know coastal AC systems inside and out.

Call Thomson AC at 562-201-3014 or reach out to us online to book your Newport Beach AC maintenance today. Get ahead of the heat and prepare your system for summer.

Why Is My Air Conditioner Freezing Up? Here’s What It Usually Means

Posted by & filed under Air Conditioning, Air Conditioning Services.

If you’ve ever looked at your air conditioner and found the refrigerant lines or indoor coil covered in ice, you’re not alone.

While it may seem strange for an air conditioner to freeze up during the summer, it’s actually a common HVAC issue, and it’s usually a sign that something isn’t working correctly.


At Thomson Air Conditioning, one of the most common questions we hear is, “Why is my AC freezing up?” The answer typically comes down to one of two things: restricted airflow or low refrigerant.

The #1 Cause of AC Freezing: Restricted Airflow

Your air conditioner relies on a steady stream of warm air moving across the evaporator coil. As that air passes over the coil, the refrigerant inside absorbs heat, cooling your home.

When there isn’t enough airflow, the coil gets colder and colder until moisture in the air freezes onto it. Over time, that thin layer of frost can become a solid block of ice.

Think of it like an ice skating rink. An ice rink is essentially a cooling system with very little airflow. Without warm air constantly passing over the surface, it continues getting colder until ice forms. Your evaporator coil behaves the same way.

Common causes of restricted airflow include:

  • A dirty or clogged air filter
  • Blocked or closed supply vents
  • Damaged, kinked, or disconnected ductwork
  • A dirty evaporator coil
  • Poor duct design that doesn’t move enough air

If your AC is freezing repeatedly, checking the airflow should always be the first step.

The Second Common Cause: Low Refrigerant

The other major reason an AC coil freezes is low refrigerant.

As refrigerant pressure drops, so does its temperature. If the pressure becomes too low because of a refrigerant leak, the evaporator coil can fall below freezing, causing ice to form.

Unlike a dirty filter, refrigerant doesn’t get “used up.” If your AC system is low on refrigerant, there’s almost always a leak that should be found and repaired by a qualified HVAC technician.

Signs Your Air Conditioner May Be Freezing


Watch for these common symptoms for your AC freezing:

  • Ice on the refrigerant lines
  • Frost covering the indoor evaporator coil
  • Water dripping around the indoor unit after the ice melts
  • Weak airflow from your vents
  • Your AC runs constantly but struggles to cool your home

Ignoring these signs can lead to reduced efficiency, higher utility bills, and even compressor damage.

What Should You Do If Your AC Freezes?

If you notice ice on your AC system:

  1. Turn off your air conditioner.
  2. Switch the fan to ON to help thaw the ice.
  3. Check and replace your air filter if it’s dirty.
  4. Make sure all vents are open and unobstructed.
  5. If the system freezes again after thawing, schedule a professional inspection.

Continuing to run a frozen system can make the problem worse and may cause expensive damage.

Keep Your System Running Efficiently

Many frozen air conditioner problems can be prevented with routine maintenance. Regular inspections help identify airflow issues, dirty coils, refrigerant leaks, and other small problems before they become major repairs.

If your air conditioner keeps freezing up, the team at Thomson Air Conditioning can diagnose the cause and get your AC system back to cooling efficiently.

Whether it’s a simple airflow issue or a refrigerant leak, we’ll help you find the right solution so your home stays comfortable all summer long. Reach out to us and we can get you back up and running for the long hot Southern California summer head.

AC Repair in Costa Mesa: Get Fast Help When Summer Heat Hits

Posted by & filed under AC Repair, Air Conditioner, Air Conditioning, Air Conditioning Services, HVAC.


It always happens at the worst time. The Costa Mesa afternoon hits 90 degrees. You walk inside expecting relief. The house feels like an oven.

You check the thermostat. The AC is running. The air coming out of the vents is warm.

That moment of panic is real. You start doing the math on a repair bill you didn’t plan for. You wonder how long your family has to sweat it out.

Most AC breakdowns aren’t random. They build slowly through spring. A low refrigerant charge. A tired capacitor. A clogged drain line that finally gives up.

By the time the heat arrives, your AC unit is running on borrowed time. Then it stops.

The good news is that most summer breakdowns are fixable, often same-day.

In this article, we’ll explore what causes these failures and what repairs cost. We’ll also show you how to find fast help.

Why COSTA MEsa AC Units Break Down in Summer

Heat is the trigger, not the cause. Your AC works hardest in July and August. That extra strain exposes weak parts that limped through spring.

A few failures show up again and again in Costa Mesa homes:

  • A failed capacitor. This small part starts the compressor. Heat wears it out fast, and the AC stops cooling.
  • Low refrigerant from a slow leak. Your system blows warm air and the outdoor coil can freeze over.
  • A clogged condensate drain line. Water backs up, the safety switch trips, and the AC shuts off.
  • A worn compressor. Years of run time and skipped maintenance take their toll.

Heat also raises the stakes. According to the CDC, heat is the leading weather-related cause of death in the United States. The National Weather Service warns that indoor heat is especially dangerous for kids, older adults, and pets.

A broken AC isn’t just uncomfortable. During a heat wave, it’s a real safety issue.

Coastal Costa Mesa adds its own twist. Salt-laced ocean air corrodes outdoor components faster than inland conditions. That corrosion eats at electrical contacts and coil fins over time.

So a system that would last 15 years inland might show trouble sooner here. Local wear patterns are part of why repairs cluster in the summer months.

What AC Repair Costs and How Long It Takes

Here’s the part most homeowners want to know first: the price.

A typical AC repair in Costa Mesa runs $150 to $800. Simple fixes are at the low end. A capacitor swap or drain clearing often costs $150 to $400 and takes under an hour.

Bigger AC repairs such as a refrigerant leak repair runs $400 to $1,500 depending on the leak. A failed AC compressor is the priciest fix, often $1,200 to $2,800.

Most repairs wrap up in a single visit. A licensed technician diagnoses the problem, confirms the price with you, and gets your home cool again the same day.

When you call Thomson Air Conditioning, you get a clear diagnosis and an honest quote before any work starts. No surprises on the bill.

There’s a smarter long game too. The U.S. Department of Energy reports that a well-maintained AC keeps its efficiency and lasts years longer. A small repair caught early often prevents a full replacement later.

The order of the bill matters too. Diagnosis fees usually run $75 to $150, and a good company rolls that into the repair cost. Ask before you book.

Watch out for flat-rate quotes given over the phone. No honest technician prices a compressor without seeing your system first.

How to Get Fast AC Help in Costa Mesa

Speed matters when your home is heating up. Here’s how to handle a breakdown without making it worse.

First, shut the system off if you see ice on the outdoor unit or smell burning. Running a frozen or overheating AC causes more damage.

Next, check the simple stuff. A tripped breaker or a packed air filter sometimes solves the problem in two minutes. A clogged filter starves the system of airflow.

If that doesn’t fix it, call a professional. The Department of Energy recommends professional service for any refrigerant, electrical, or compressor issue.

This is where local HVAC experience matters. A Costa Mesa company knows that coastal adjacent AC systems and the salt-air corrosion that wears them down faster. Our residential HVAC team handles repairs across the area, including same-day calls during heat waves.

Don’t wait days for relief. The longer a broken AC sits, the hotter your home gets and the more a small problem can grow.

While you wait for the technician, stay cool safely. Close blinds against the afternoon sun. Run fans to keep air moving. Drink plenty of water.

Get Your AC Running Again Today


A summer AC breakdown in Costa Mesa feels like an emergency because it is one. Warm air, a hot house, and a repair bill you didn’t expect add up to a stressful day.

The fix is usually simpler than you fear. Most repairs cost a few hundred dollars and finish in a single visit. The key is acting fast before the problem spreads.

Has your AC quit in Costa Mesa or across Orange County? Thomson Air Conditioning is ready to help. Our licensed technicians have served the local Costa Mesa area for years.

We know how to get coastal systems cool again fast.


Call Thomson AC at (562) 373-2386 or reach out to us online to book your AC repair today. Beat the heat, and get your Costa Mesa home comfortable again fast.

A Smart Guide to Air Conditioning Installation in Seal Beach

Posted by & filed under Air Conditioner, Air Conditioning Services.

Your air conditioner in Seal Beach has worked hard for years. Now it feels like it’s limping through summer. It feels hotter inside than outside. Your energy bills climb every month. Your AC unit cycles on and off without cooling much.

Maybe an HVAC tech told you the compressor is already shot. Or the refrigerant is leaking faster than they can recharge it.

At some point, the math no longer works to continue doing AC repairs. When you are considering the cost of a new AC installation, the choices can feel confusing.

Which size AC unit? Which AC unit brand? Which efficiency rating?

Many homeowners get stuck in decision fatigue and end up waiting, figuring they can suffer through one more summer with a failing system.

The cost of waiting for an AC replacement adds up fast. The U.S. Department of Energy confirms that older AC units use 30 to 50% more energy than modern high-efficiency systems.

In this article, we’ll cover everything you need to know about air conditioning installation in Seal Beach. We’ll explain how to size your system, what costs to expect, and how to find local help.

What Drives AC Installation Decisions in Seal Beach

Seal Beach homes have specific cooling needs. Coastal homes near Main Street and the Pacific Coast Highway enjoy mild summers most years, while inland areas like College Park East and The Hill see hotter peaks. That climate variety changes which AC system fits your home best.

New federal regulations also shape your options. The Department of Energy confirms all new central AC units sold after January 2023 must meet SEER2 efficiency standards, so older SEER ratings no longer apply. For Seal Beach homes, the minimum SEER2 rating is 14.3, though higher-efficiency units offer 16, 18, or even 22. The higher the rating, the lower your monthly bill.

Common AC installation choices include:

  • Central split systems for whole-home cooling
  • Heat pumps that provide both cooling and heating
  • Ductless mini-splits for additions, garages, or zoned rooms
  • High-efficiency variable-speed units for maximum savings

Sizing matters more than most homeowners realize. An oversized unit cycles on and off, wears out faster, and creates humidity problems, while an undersized unit runs constantly without ever keeping up. That is why pros use a Manual J calculation to size your system, factoring in square footage, insulation, windows, ceiling height, and sun exposure. A 1,500-square-foot home in Seal Beach typically needs a 2- to 3-ton system.

Federal tax credits can also affect the decision. The Inflation Reduction Act offers up to $2,000 in tax credits for high-efficiency heat pump installations through 2032.

One myth costs Seal Beach homeowners thousands: the belief that bigger AC units cool better. They do not. Right-sized units always outperform oversized ones for comfort, efficiency, and lifespan.

How to Plan Your AC Installation


A smooth AC installation in Seal Beach starts with the right contractor. Begin with a free in-home consultation, where a pro will inspect your existing ductwork, measure your rooms, and check your electrical panel before recommending equipment based on your home’s specs and your budget.

Look for these signs of quality:

  • California C-20 HVAC license from the state board
  • Manual J load calculation for proper sizing
  • Written estimates with brand, model, and SEER2 rating listed
  • NATE-certified installers trained on current codes
  • Manufacturer warranties on parts and labor

Installation costs in Seal Beach vary by system. Standard central AC installations average $5,500 to $9,500, while high-efficiency systems run $8,000 to $13,000. Heat pump installations cost $7,000 to $15,000, and ductless mini-split systems start around $4,500 for single zones.

The full process usually takes one to three days. The crew removes the old equipment, installs the new components, runs new refrigerant lines, and tests the system before they leave.

Permits matter too. The City of Seal Beach requires HVAC permits for all installations, and quality contractors handle that paperwork for you. Skip the permit, and you will run into problems when you sell your home later.

Thomson AC handles air conditioning installation across Seal Beach, Old Town, College Park East, and Bridgeport. Visit our Seal Beach services page to see our full coverage area. Our team installs Carrier, Trane, Lennox, and other top brands, and we pull permits, handle inspections, and back our work with strong warranties.

We also offer financing options, and most Seal Beach homeowners qualify for low monthly payments on a new system. Some equipment even includes special manufacturer rebates and tax credits.

After installation, our maintenance plans keep your new system running at peak efficiency. Plan members enjoy yearly tune-ups, priority scheduling, and lower long-term costs.

Timing your installation matters in Seal Beach as well. Spring and fall offer the best scheduling and the cleanest install conditions. Summer installs still happen fast, but contractor calendars fill quickly with repair calls.

The EPA confirms that high-efficiency AC systems can cut cooling costs by up to 20% compared to older units. On a typical Seal Beach home, that adds up to $300 or more in yearly savings.

Smart-thermostat integration adds even more value. Modern systems pair with Wi-Fi thermostats that learn your schedule and adjust cooling on their own, which protects your investment and lowers your monthly bills at the same time.

Get a New AC System Built for Seal Beach

Air conditioning installation in Seal Beach comes down to the right contractor, the right size, and the right system. New systems deliver real savings: lower bills, better comfort, and fewer breakdowns, and modern equipment lasts longer and runs cleaner than older units.

Thomson AC handles AC installations throughout Seal Beach, and our certified team handles sizing, equipment selection, permits, and the full installation. Stop fighting an old AC system that cannot keep up.

Call (562) 373-2386 to schedule your free consultation. You can also visit our contact page for an online quote. Your new comfort starts here.