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International Comfort Products N9MP2075B12A1 Defrost Sensor Board
The defrost sensor control board is jobbed with determining when to begin an important defrosting cycle which may be needed in order to defrost your outdoor unit. The control board depends on a sensor located in the outdoor unit to ascertain when the defrost cycle should begin.
Signals of an ailing outdoor defrost sensor board
- The system may not work because of frost blocking the airflow outside
- Self defrost sequence has not run for a while despite the fact that there is quite a bit frost on the outdoor unit
- The primary control board may throw an error of some type referring to a failing defrost control board
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