How to Fix / Troubleshooting

Safety: Turn off and unplug the unit. Do not chip ice with sharp tools.

Steps:

Defrost: Leave the unit off with the front cover open until all ice melts. Place towels to catch water.
Clean filter and coils: Wash the filter and clean the evaporator coil as described earlier.
Check fan operation: Ensure the indoor fan runs at all speeds and provides strong airflow. Replace the indoor fan motor if weak.
Check temperature setting: Avoid setting the thermostat extremely low in very humid conditions; use a moderate setpoint and higher fan speed.

Technician needed: If icing recurs despite good airflow, a refrigerant or sensor issue may be present and should be checked professionally.

Unit ices up; visible ice on the evaporator coil or front grille, reduced airflow.

Possible Causes