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International Comfort Products NBF125J20A1 Defrost Sensor Board
The defrost sensor control board is jobbed with determining when to begin the defrost sequence which actually helps to keep the outdoor unit free from frost build-up. The defrost sensor board relies on a temperature sensor located near the condenser to make the decision on when to begin.
Major clues your outdoor defrost sensor board will die soon
- The main control board might give out a type of error code produced when the defrost board is bad
- The system will not run at all because of the amount of frost on the outdoor unit
- Unit defrost session never runs despite that there is a large amount frost on the outdoor unit
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