How to Fix / Troubleshooting

Safety: Unplug the unit before defrosting or cleaning.

Defrost coil: Turn off and unplug the unit. Allow the ice to melt naturally; place towels under the unit to catch water. Do not chip ice with sharp objects.
Clean filter and coil: Wash the filter and clean the evaporator fins to restore airflow.
Check fan operation: Verify that the indoor blower runs smoothly at all speeds. Replace the fan motor or capacitor if it is slow or intermittent.
Thermostat setting: Avoid setting the temperature extremely low in very humid conditions; use a moderate setpoint and higher fan speed.
Refrigerant check: If icing recurs despite good airflow, a refrigerant or sensor issue may exist and should be evaluated by a technician.

Evaporator coil freezes over with ice, and airflow from the front decreases significantly.

Possible Causes