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International Comfort Products GPFM42K100F Defrost Sensor Board
The defrost control board determines when to initiate the defrost cycle in order to continue normal heating and cooling operations. The defrost board looks to a temperature sensor located in the outdoor unit to ascertain when to initiate the defrosting cycle.
Indications of a laboring outdoor defrost sensor board
- Most systems will cease to function at all because of the fact that there is too much frost
- The HVAC system control board may throw an error signal if the defrost board fails
- Defrost mode will not kick in despite the fact that there is quite a bit frost in the way
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