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International Comfort Products N9MP1050B12A1 Defrost Sensor Board
The defrost control board will begin the defrost cycle which helps to get rid of the frost that collects on the outdoor unit. The defrost board is relayed information from a temperature sensor located in the outdoor unit to determine when to initiate the defrosting cycle.
Main clues your defrost board has little life left
- AC and heating system could stop running because of way too much frost build-up
- The main control board may issue an alphanumeric error code if the defrost board fails
- Unit defrost session will not initiate especially when there is frost built up
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