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International Comfort Products N9MP2050B12C2 Defrost Sensor Board
The defrost sensor control board is jobbed with determining when to begin the defrosting phase which assists to get rid of the frost that collects on the outdoor unit. It depends on a defrost sensor located near the condenser to agree when to initiate the defrosting cycle.
Major indications the AC defrost sensor board will have to be replaced
- The defrost sequence has not run for a while even though there is quite a bit frost that needs to be removed
- The whole system may not operate due to the fact of the safety features installed
- The primary control board could throw an error signal produced by a failing defrost board
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