Mike Mavromatis · Owner & Founder
Last updated
Written from Air It Up's first-hand field experience across Greater New Orleans since 2000 and reviewed for accuracy by owner Mike Mavromatis. Equipment specifics (warranty terms, efficiency ratings) reflect manufacturer-published information at the time of writing — always confirm current terms for your exact model.
Why does a coil freeze?
Cooling pulls moisture out of the air as condensate. If airflow drops or refrigerant is low, the evaporator coil gets so cold that condensate freezes into ice, which blocks airflow further — a worsening loop.
First steps when you see ice
- Turn the system off (or set fan to ON only) and let the ice fully thaw.
- Replace a dirty filter and open any closed vents.
- Do not run cooling again until the coil is clear.
Failure modes behind a recurring freeze
If it keeps freezing, the cause is usually a refrigerant leak (low charge) or a blower/airflow problem — not something a new filter alone fixes. These need a technician to find and repair the root cause.
Proof and your next step
Repeat freeze-ups are one of our common humid-season calls, and they rarely fix themselves. If thawing and a fresh filter do not hold, book an AC repair.
Frequently Asked Questions
- Should I run my AC if it is frozen?
- No. Running a frozen system can damage the compressor. Turn it off, let the ice melt completely, replace the filter, then try again — and call a pro if it refreezes.
- Will a new filter stop my AC from freezing?
- Sometimes, if a clogged filter was the cause. If it freezes again after a fresh filter, the likely culprit is low refrigerant or a blower issue that needs service.
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