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International Comfort Products C8DNL050B12A1 Defrost Sensor Board
The defrost sensor control board instructs the outdoor unit to begin the defrost sequence if necessary, to keep the outdoor unit free from frost build-up. The defrost sensor board depends on a sensor located near the condenser to make the decision on when to begin.
Important clues to watch for in a failing outdoor defrost sensor board
- The AC may stop working due to the frost blocking the flow of air
- Self defrost sequence refuses to initiate even though there is a lot of frost built up
- The control board might issue an alphanumeric error code produced by a bad defrost control board
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