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International Comfort Products C9MPD100J20C1 Defrost Sensor Board
The defrost sensor control board instructs the outdoor unit to begin the defrost cycle if necessary, to get rid of the frost that collects on the outdoor unit. The control board is influenced by a specific sensor that can be found near the condenser, in order to decide when the defrost cycle should begin.
Some clues of a failing defrost board
- Defrost mode refuses to initiate despite the fact that there is quite a bit frost that makes the unit run like crap
- The system may cease to function due to the frost blocking the flow of air
- The HVAC system control board could throw an error signal produced by a failing defrost board
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