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International Comfort Products H9MPD050F12A1 Defrost Sensor Board
The defrost sensor board determines when or if to start an important defrosting cycle which assists to keep the outdoor unit free from frost build-up. The defrost sensor board looks to a defrost sensor located somewhere by the condenser to agree when to initiate the defrosting cycle.
Major indications your outdoor defrost sensor board should need replacing
- The HVAC system control board may signify an error code referring to the failed defrost sequence
- The AC may stop working for the simple fact of lack of airflow through the outdoor unit
- Defrost mode never kicks in especially when there is a rather large amount of frost on the unit
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