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International Comfort Products PGMD30G0904 Defrost Sensor Board
The defrost control board will begin the defrost cycle if necessary, to rid your unit of frost that can build up. The board is influenced by a defrost sensor located in the outdoor unit to verify when to initiate the defrosting cycle.
Red flags to watch for in a bad defrost board
- Your main control board may throw an alphanumeric error code when the defrost board fails
- Self defrost sequence never starts even though there is quite a bit frost in the way
- The whole system may cease to operate due to frost blocking the airflow outside
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