What to do if Perfect Aire 3PACH8000 is cooling but room is too warm and ice is forming?
- JJerry WilliamsAug 18, 2025
If your Perfect Aire heat pump is cooling, but the room remains too warm and ice forms on the cooling coil, it could be due to several reasons. If the outdoor temperature is below 64ºF (18ºC), set the unit to FAN only mode to defrost the coil. A dirty air filter can also cause this issue; clean the filter. If the thermostat is set too cold for nighttime cooling, defrost the coil by setting it to FAN only mode and then raise the temperature setting.


