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ice forming on the Window AC

  • TS: Icing/Frost
  • Ice/Frost Behind Front Grille (Freezing Up)
  • Troubleshooting
  • Window Air Conditioners
  • Last Updated 12/06/2012

Why is ice forming on the unit?


Check to make sure the air filter is clean.
If the outdoor temperature is below 70
oF (21oC), then the coil may ice up during operation.

If this is the case, set the unit to fan only mode and low fan speed and allow the unit time to run until the ice is melted.
Confirm that the air conditioner is sized appropriately for the square footage of the room.

Best regards

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