Most people plug their computer and TV into a surge protector without thinking twice. Your air conditioner is one of the most expensive pieces of equipment in your home, yet it often has no surge protection at all.
So should you put a surge protector on your AC? The short answer is yes. Here’s why.
Watch the short video:
Why surge protection matters more now
A few years ago, an AC surge protector wasn’t a big deal. Most contractors didn’t even think about them. Older systems were mostly simple on/off equipment with few sensitive electronics.
That has changed. Today’s inverter systems and other new technology rely on circuit boards to control compressor speed, fan speed, and efficiency. Those boards make modern systems quieter and more efficient, but they are also more vulnerable to power surges.
A single surge can damage a board and leave you without cooling. Replacing a control board can be expensive, especially in the middle of summer.
What an HVAC surge protector does
An HVAC surge protector is a small device installed at your AC equipment. It sits between the power supply and your system. When a voltage spike comes through, it diverts the extra energy away from the sensitive electronics inside your unit.
Power surges can come from lightning, utility grid switching, or large appliances cycling on and off. Many are small and happen without you noticing. Over time, even small surges can wear down electronic components.
Why we install one on every new system
Over the past year or so, supply houses and contractors like us have started recommending surge protectors to help equipment last longer. At Thomson AC, we now install one on every new system.
Already have a system without one? You don’t need to replace anything. We can add a surge protector to your existing equipment during a service visit or tune-up.
Frequently asked questions
Does my AC really need a surge protector?
If you have a newer or inverter system, yes. These systems depend on circuit boards that are sensitive to power surges.
Can I just use a regular plug-in surge protector?
No. Central AC systems are hardwired, so they need an HVAC-rated surge protector installed by a technician.
Can you add one to my existing system?
Yes. If your system doesn’t have one, adding it is an option. We can install it during your next service visit.
Does a surge protector replace regular maintenance?
No. It protects the electronics from power spikes. Your system still needs regular tune-ups to run efficiently.
Protect your investment
A new AC system is a big investment, and a surge protector is a simple way to protect it. If you’re in Huntington Beach or anywhere in Orange County and want to add surge protection to your system, schedule service with Thomson AC.
Last year we installed a Quilt in a friend’s master bedroom in Seal Beach. This year we went back and added a second head unit in his living room, and it connects to the same outdoor unit. That’s what makes these Quilt units so cool: you can bring comfort to another room without a second outdoor unit.
Watch the whole install in about a minute:
Why one outdoor unit matters
Adding a room is much simpler when the new head unit shares the outdoor unit you already have. Instead of setting new equipment outside the house, most of the outside work is tying the new refrigerant line set in with the existing one and running it to the unit.
In this Seal Beach job, that meant the master bedroom kept the comfort it already had, and the living room got its own head unit on the same system.
How the install went, step by step
Measure and mount. We measure everything, get it level and straight, then set anchors in the wall for the mounting plate.
Cut the hole for the refrigerant pipes. We slope it just right so condensation drains out.
Center the unit. In this install, we lined it up over the existing picture frame hanger so it sits cleanly on the wall.
Run the line set outside. The pipes go down the exterior wall, we cut and stick on the back plate, and we tie the new line set in with the old one and run it to the outdoor unit. Everything gets zip-tied into place.
Make the connections. We prep and flare the fittings, then connect to the electrical end of the existing unit.
Test for leaks. We dial in the refrigerant pressures and pressurize with nitrogen to make sure there are no leaks.
Before you add another room
A few things decide how smooth a second head unit will go:
The existing system. Whether your current outdoor unit can take another head unit depends on the equipment, so we confirm that before any work starts.
Wall placement. The unit needs a spot where it can be mounted level, anchored securely, and centered on the wall.
Drain path. The pipe hole has to slope correctly so condensation drains away.
Line set route. The new line set needs a clean path down the exterior wall to tie in with the existing one.
Thinking about adding a room?
Thomson Air Conditioning installs ductless mini-split systems and heat pumps in Huntington Beach, Seal Beach, Los Alamitos, Newport Beach, Costa Mesa, Irvine, and surrounding Orange County communities. If you already have a system and want to add another room, get in touch and we’ll take a look.
Most homeowners follow a set it and forget it philosophy when it comes to their home HVAC systems.
This attitude is understandable as the AC unit is hidden from view for most people, and also not something they can maintain or clean themselves.
As long as cool air is coming out of the vents in July and warm air in January, the AC system remains out of sight and out of mind.
However, an HVAC system is a complex unit. The machinery is usually the most expensive appliance in your home, and a lack of AC maintenance is usually a recipe for financial and physical discomfort.
In this article, we will look at three benefits of HVAC maintenance service and how it can save you money over the long term.
What is HVAC Maintenance?
At its core, HVAC maintenance is a comprehensive wellness exam for your home’s climate control system. Think of it as the equivalent of a 30,000-mile service for a car or truck.
Most homeowners are only familiar with their HVAC system through the thermostat. However, the HVAC unit itself is a sophisticated network of electrical, mechanical, and chemical processes.
For this reason, air conditioning maintenance is the scheduled practice of inspecting, cleaning, and tuning these components to ensure they operate according to the manufacturer’s original specifications.
Having regular HVAC service on your system means you move from reactive to proactive, and you can identify wear and tear before it results in a total system shutdown.
This process involves a professional HVAC technician restoring the system to its peak state and keeping the balance of airflow and heat exchange to protect both your financial investment and your daily comfort.
What does HVAC Maintenance include?
A professional HVAC maintenance visit (sometimes called an HVAC tune up) is far more intensive than a simple filter change; it is a multi-point inspection that covers every critical subsystem.
The process typically begins with the mechanical and electrical components. Technicians measure the “amp draw” of the motors and test capacitors, which are the “batteries” that jumpstart your compressor. They also tighten electrical terminals that may have vibrated loose, preventing potential short circuits or fire hazards.
Next, the focus shifts to hygiene and airflow. This includes a deep cleaning of the evaporator and condenser coils, which are often caked in pollen, dust, or dirt.
The HVAC technician will also inspect the blower fan for balance and clear the condensate drain line of algae buildup to prevent water damage to your home. Finally, the technician performs a performance analysis.
Three Reasons Why HVAC Maintenance is Important
Regular HVAC maintenance isn’t just a “nice to have”—it directly affects your energy bills, system reliability, and the air you breathe every day.
By understanding the mechanics of how your system degrades over time, you can transition from reactive repairs to proactive care.
Here are three reasons HVAC Maintenance saves you money and solves problems before they happen.
1. Maximizing Energy Efficiency
The primary goal of your HVAC system is to transfer heat. In the summer, it moves heat from inside your home to the outside; in the winter, the process is reversed (generated via combustion).
For this heat exchange to happen efficiently, the system relies on clean surfaces and unobstructed airflow.
As your system operates, it pulls in ambient air. Over time, microscopic dust, pet dander, and debris begin to coat the evaporator and condenser coils. Even a thin layer of dust acts as an insulator, preventing the refrigerant inside the coils from effectively absorbing or releasing heat.
When either the evaporator coil or condenser coil is dirty, the system has to run longer to reach your desired thermostat setting.
This issue is known as ‘short cycling’ or extended run times, both of which spike your kilowatt-hour usage and hence your energy bill. On top of this, blower wheels weighted down by grime require more torque to spin, pulling more electricity while moving less air.
When you neglect HVAC maintenance, you are essentially paying for a machine that isn’t doing the job it was designed to do. Industry data suggests that a neglected HVAC system can lose up to 5% to 15% efficiency every year.
In a standard household, that translates to hundreds of dollars in wasted energy annually, and can also lead to emergency service at some stage.
2. Preventing Costly Breakdowns
Have you noticed that your AC unit will fail on the hottest day of the year, and your furnace will quit during a record-breaking blizzard?
This isn’t just bad luck; it’s because extreme weather puts the highest load on your system, causing weakened components to break.
Identifying the Potential HVAC Repair Problems Early
Routine AC maintenance is essentially a diagnostic physical for your home. A technician looks for the small issues that can eventually lead to a need for HVAC repair:
Clogged Drain Lines: Air conditioners pull moisture from the air. This water collects in a condensate pan and flows out a drain line. If this line clogs with algae or sediment, the water backs up, leading to flooded floorboards, mold growth, or a system-wide safety shutoff.
Worn Mechanical Components: Capacitors, contactors, and fan belts have finite lifespans. An air conditioner technician can test a capacitor’s microfarads to see if it’s within range.
Electrical Connections: HVAC units vibrate. Over months of operation, electrical connections can loosen, leading to “pitting” or electrical fires. Tightening these connections ensures the system remains safe and operational.
3. Indoor Air Quality: Breathing Better Every Day
We spend roughly 90% of our lives indoors. Because modern homes are built to be airtight for energy efficiency, the air inside is often 2 to 5 times more polluted than the air outside. Your HVAC system is responsible for the quality of air that your family is breathing.
While changing your 1-inch pleated filter is a great start, it isn’t a cure-all. Filters are primarily designed to protect the equipment, not necessarily the humans.
However, when an HVAC system is poorly maintained, the internal cabinet can become a breeding ground for biological growth.
Humidity Control: A well-maintained system properly dehumidifies your home. If the system is sluggish or the coils are dirty, humidity levels rise, which encourages dust mites and mold spores to thrive.
Allergen Reduction: During a maintenance visit, a technician cleans the blower housing and ensures that the ductwork isn’t pulling in “unconditioned” air from dusty attics or damp crawlspaces due to leaks.
Carbon Monoxide Safety: For gas furnaces, maintenance includes checking the heat exchanger for cracks. A cracked heat exchanger can leak deadly carbon monoxide into your living space—a risk that makes annual inspections a literal matter of life and death.
The Benefits of HVAC Maintenance Service
Investing in a preventative maintenance plan or a biannual check-up (once for cooling, once for heating) provides a compounding return on investment.
Feature
Without Maintenance
With Regular Maintenance
Monthly Bills
Tend to climb 5–10% annually
Remain stable and optimized
System Lifespan
10–12 years
15–20 years
Repair Costs
High (Emergency rates)
Low (Proactive replacements)
Air Quality
High dust, potential mold
Filtered, clean, and balanced
HVAC Maintenance Helps Protect Your Investment
Your HVAC system is a complex symphony of pressurized refrigerant, high-voltage electricity, and high-speed mechanical movement.
Expecting it to perform flawlessly for a decade without a tune-up or inspection is like expecting a car to run for 100,000 miles without an oil change. This neglect is what leads to costly repairs when you least expect them.
Preventative maintenance helps your AC unit and heating system to reduce energy consumption, prevent unexpected breakdowns, and improve indoor air quality.
HVAC system maintenance transforms your HVAC system from a source of anxiety and expense into a reliable tool for comfort. If you want your system to run efficiently, last longer, and keep your home a sanctuary, regular maintenance is the only way forward.
Orange County HVAC Maintenance Service Done Right
Need HVAC maintenance service in Orange County? Thomson AC are specialists in Southern California HVAC repair, maintenance, and installation. We help homeowners throughout Huntington Beach, Newport Coast, Irvine, and everywhere in between. Contact us today to see how we can help with your HVAC maintenance service.
