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If you’ve ever noticed ice forming on your air conditioner, you might assume it just means your system is working overtime to keep your home cool. Unfortunately, that frosty layer is actually a warning sign—and one you shouldn’t ignore. Ice buildup on your AC unit is a signal that something’s wrong inside the system. Ignoring it can lead to expensive repairs or even a complete breakdown.
At Westerly Air, we help San Antonio homeowners stay ahead of these issues with fast AC maintenance service you can count on.
What Causes Ice on an AC Unit?
Ice buildup can happen for several reasons, most of which stem from airflow or refrigerant issues. Some of the most common causes include:
Dirty Air Filters: When filters are clogged, airflow is restricted. Without proper airflow, the evaporator coil gets too cold and freezes.
Low Refrigerant Levels: A refrigerant leak can reduce pressure in the coils, causing them to freeze.
Blocked or Closed Vents: Limited air circulation throughout the system can create an imbalance, triggering freezing on the evaporator coil.
Faulty Blower Fan: If your blower fan isn’t working properly, warm air from your home can’t reach the coil, causing ice to form.
Whatever the root cause, frozen coils put your system at risk and reduce cooling efficiency. That means higher energy bills and less comfort.
Why Ice is a Bigger Problem Than You Think
When ice forms on your AC unit, it might seem harmless. But left unaddressed, that ice can cause serious damage. It can warp coils, crack components, and strain your compressor—often the most expensive part of your AC system. If the compressor burns out, you’re likely looking at a full replacement.
In the Texas heat, your system has to work extra hard. Ice on your AC means your unit is struggling, and that struggle turns into wasted energy and shortened lifespan.
What to Do If You See Ice
The first step is to turn off your AC to prevent further damage. Let it thaw completely before turning it back on. Then, check your air filter and vents to ensure airflow isn’t blocked. If that doesn’t resolve the issue, it’s time to call the pros.
At Westerly Air, our experienced techs will run a full system diagnostic to pinpoint the issue, explain your options, and get your AC running smoothly again. We know how important reliable cooling is in San Antonio, and we’re proud to offer same-day service, transparent pricing, and real solutions you can trust.
Stay Ahead With Preventive Maintenance
The best way to avoid frozen coils? Preventive maintenance. Our AC tune-ups include coil inspections, refrigerant checks, airflow testing, and more—all designed to catch small issues before they become major problems. And at just $79 for a system check-up, it’s a smart investment in your comfort.
Don’t let a little ice turn into a big headache. Call (210) 361-2722 today to schedule your AC check-up with Westerly Air—your trusted air conditioning repair experts in San Antonio.