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What Causes an Air Conditioner to Freeze Up?

If your air conditioner is freezing up, there are a few simple troubleshooting questions you can try out before considering total replacement.

What Causes an Air Conditioner to Freeze Up

Is My AC Getting Enough Ventilation?

Air conditioners need to have reliable intake and exhaust in order to function. This means if you have objects blocking many vents, that could be the source of your problems. Filters that are clogged can have a similar effect. This is partly why HVAC pros recommend you change out filters multiple times a year, with exact frequency depending on how many people and animals reside with you.

Is My AC Set Too Low?

The lowest temperature most residential units are designed to maintain is 67° F. So setting the temperature any lower than that may contribute to the freezing-over. Some people mistakenly assume setting the AC lower will result in it reaching an acceptable temperature faster. But this does little good and can do much harm if you forget about it.

Is My AC Leaking Coolant?

Unlike the first two questions, this one lacks an easy fix. If you suspect there is a leak, then you should get in touch with an HVAC professional. You’re going to need someone with a license to legally replace any Freon or other coolant.

If you live in the Greater Phoenix area and want to get in touch with the kind of pro you can count on, then call A Quality at 623-853-1482 any time day or night.

Customer Testimonials

“Manny came to repair my air conditioner. It took several procedures and he finally replaced my new motor. It seems to be doing the trick. He also put in a new thermostat . Mine was 21 years old so it was time. He was pleasant and easy to work with; answered all my questions, and there were a lot, until I understood. I would recommend this company and this tech unconditionally!!!” - Midge Abel
“Jason was pleasant, professional, and helpful. He clearly talked about my options and answered all my questions. I’d gladly do business with him again.” - Katrine Cady
“Our upstairs AC stopped working yesterday and I chose this business because of their 5 star reviews. They did not disappoint. Rachel was amazing. She is not only friendly but she is very professional. She was ready to send someone out within an hour! John came out and was very knowledgeable, professional and above all, honest. You don’t see that very often anymore. I will definitely come to them for my future AC/Heater needs.” - Heidi Hedina

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    • Astoria Mountain Ranch
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    • Phoenix
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    • Peoria
    • Scottsdale
    • Glendale
    • Surprise
    • Goodyear

    623-253-3802