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International Comfort Products GPSM42K100F Defrost Sensor Board
The defrost sensor board instructs the system to activate the defrosting phase which actually helps to get rid of the frost that collects on the outdoor unit. The defrost sensor board relies on a temperature sensor located in the outdoor unit to make the decision on when to begin.
Subtle hints your outdoor defrost sensor board has little life left
- The HVAC system could cease to function at all because of the frost blocking the flow of air
- The main control board might give out a specific error code produced by too much frost
- Defrosting refuses to initiate even though there is quite a bit frost that needs to be removed
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