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International Comfort Products NDN5100BFC2 Defrost Sensor Board
The defrost control board is jobbed with determining when to begin the defrost sequence if necessary, to get rid of the frost that collects on the outdoor unit. The board depends on a sensor located in the outdoor unit to decide when to begin.
Red flags of a defective AC defrost sensor board
- Defrost session will not kick in especially when there is a rather large amount of frost in the way
- Air conditioning may not run for the fact of the frost blocking the flow of air
- The main circuit board might give out an alphanumeric error code referring to the failed defrost sequence
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