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International Comfort Products NHP242AKA1 Defrost Sensor Board
The defrost sensor board instructs the outdoor unit to begin the defrosting phase which may be needed in order to get rid of the frost that collects on the outdoor unit. The defrost sensor board relies on a specific sensor which is near the condenser somewhere, in order to verify when to begin.
Signs to watch for in a failing defrost sensor board
- The HVAC system could stop operating for the fact of the frost blocking the flow of air
- The main control board could throw an error code if the defrost control board fails
- Self defrost sequence will not kick in despite the fact that there is quite a bit frost on the external unit
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