AC Troubleshooting
AC Freezing Up — What It Means & How We Fix It
An air conditioner covered in ice in the middle of summer sounds contradictory — but it's a real and common problem. Ice on your AC's indoor coil (evaporator) or refrigerant lines means your system is not working properly and needs attention. RG Mechanical diagnoses and fixes frozen AC issues throughout Central Maine.
What to Expect
Always caused by restricted airflow or low refrigerant — never 'normal'
Clogged air filter is the most common cause — replace it first
Dirty evaporator coil reduces airflow over the refrigerant
Low refrigerant causes coil temperature to drop too low
Turn the system off (fan only) to allow thawing before we arrive
Running a frozen system can damage the compressor
Frequently Asked Questions
Why is my air conditioner freezing up?
Ice forms on AC coils when refrigerant gets too cold — caused by low refrigerant or restricted airflow from a clogged filter or dirty coil. Both are fixable.
What should I do if I see ice on my AC?
Turn the system to FAN ONLY mode to allow thawing without running refrigerant. Do not keep running it in COOL mode. Call us for diagnosis — it will freeze again without fixing the underlying cause.
Can a frozen AC damage my home?
Yes — when the ice melts, it can overflow the condensate pan and drip through ceilings. If you see ice, address it promptly.
Can I prevent my AC from freezing up?
Yes — replace your filter regularly (every 1–3 months), keep coils clean, and schedule annual maintenance. These three things prevent most freezing issues.
Ready to get started?
Call us or request a project estimate. Contact RG Mechanical to confirm service availability for your community.
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