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International Comfort Products HAC236GKA4 Defrost Sensor Board
The defrost control board determines when to initiate the defrost cycle which actually helps to keep your outdoor unit from plugging up. The control board is relayed information from a sensor located somewhere by the condenser to make the decision on when to begin.
Subtle hints your defrost board is not going to last much longer
- AC and heating system could not operate due in part to frost blocking the airflow outside
- The main control board may throw an error of some type when the defrost control board refuses to initialize properly
- The defrost sequence does not run even though there is a lot of frost built up
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