Evaporator coil freezes over with ice, reducing airflow and cooling.

Safety: Unplug the unit before defrosting. Do not chip ice with sharp objects; you can puncture the coil.

Steps:

• 1. Thaw the coil: Turn the unit off and allow the ice to melt naturally, or run in FAN-ONLY mode to speed thawing. Place towels to catch water.
• 2. Clean filter and coil: Wash the filter and clean the evaporator coil to restore airflow.
• 3. Check fan operation: Ensure the indoor fan runs continuously in COOL mode and at the selected speed. Replace the fan motor if it is slow or intermittent.
• 4. Thermostat setting: Avoid setting the temperature extremely low in cool, humid conditions, which can promote icing.
• 5. Refrigerant check: If icing recurs with clean filters and good airflow, a low refrigerant charge or metering issue may be present. This requires professional diagnosis.