Key takeaways
- Airflow problems and low refrigerant are the usual causes
- Turn the AC off and let it thaw
- Running a frozen system can damage the compressor
- Find the cause or it will freeze again
Why it happens
The indoor coil gets very cold. If airflow across it is too low, from a dirty filter, a failing blower or blocked vents, or if refrigerant is low, the coil can drop below freezing and collect ice.
Ice then blocks airflow even more, making the problem worse.
What to do right away
Turn the cooling off and set the fan to on to speed the thaw. Replace a dirty filter and make sure vents are open. Expect water as the ice melts, and clear the drain pan if needed.
Do not chip off the ice.
Find the cause
If it freezes again, the cause is probably a blower fault, a leak or a duct problem. A technician can find it and fix it.
Running a frozen system risks flooding and compressor damage.
Related services
Quick answers
How long does it take to thaw?
Several hours, depending on the ice. Running the fan helps.
Can I run the AC while it is frozen?
No. It can damage the compressor and cause water damage.
Ready to talk it through? Get a free estimate or call 615-431-3789.