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DIY Troubleshooting Guide
How to Fix a Frozen AC Unit
What to do when thick ice builds up on your indoor AC coil or copper lines.
DifficultyModerate
Est. Time⏱️ 2-4 hours
1
1Step
Shut Off the AC Immediately
Switch the thermostat cooling to OFF. Running a frozen AC can damage the compressor beyond repair. Switch the Fan setting to ON to blow ambient air across the coil and accelerate thawing.
2
2Step
Check for Airflow Obstructions
A lack of warm airflow causes coils to freeze. Replace a dirty filter, and ensure all supply registers and return vents are open and not blocked by furniture.
3
3Step
Wait for Full Thawing
It can take several hours for the block of ice to melt. Do not attempt to chip the ice away manually as you may pierce the copper refrigerant tubing.
Still experiencing issues?
If you completed the DIY steps and your system is still not functioning properly, it may require a professional diagnosis.
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