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International Comfort Products H9MPX060F12A2 Defrost Sensor Board
The defrost sensor board determines when to initiate the defrost cycle which may be necessary to keep the outdoor unit free from frost build-up. The defrost sensor board looks to a sensor located somewhere by the condenser to make the decision on when to begin.
Major symptoms your outdoor defrost sensor board is going out
- Your system could not run because of way too much frost build-up
- Your main control board could display an error number referring to the failed defrost sequence
- The defrost feature never runs despite the fact that there is quite a bit frost on the external unit
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