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International Comfort Products GNL075N12C3 Defrost Sensor Board
The defrost control board is jobbed with determining when to begin the defrosting phase which actually helps to keep the outdoor unit free from frost build-up. The defrost sensor board looks to a sensor located near the condenser to make the decision on when the defrost cycle should begin.
Simple signals the defrost sensor board needs replacing
- The defrost feature never starts even though there is a lot of frost in the way
- The whole system may end up not running for the fact of lack of airflow through the outdoor unit
- The main circuit board might issue a specific error code produced when the defrost board is bad
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