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International Comfort Products NDC7075BFA1 Defrost Sensor Board
The defrost sensor control board instructs the outdoor unit to begin the defrost sequence in order to keep the outdoor unit free from frost build-up. The board relies on a sensor located near the condenser to ascertain when the defrost cycle should begin.
Some warnings of a defective defrost board
- The main control board might issue an error number referring to a bad defrost board
- The whole system may cease to function due to lack of airflow through the outdoor unit
- Defrosting has not run for a while even though there is a large amount of frost that needs to be removed
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