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Carrier 25HPA548H0030010 Defrost Sensor Board
The defrost control board instructs the system to activate the defrost cycle in order to keep the outdoor unit free from frost build-up. The defrost sensor board is influenced by a sensor which is near the condenser somewhere, in order to determine when to initiate the defrosting cycle.
Major clues the defrost sensor board is going out
- The whole system may cease to operate due in part to the amount of frost on the outdoor unit
- The defrost sequence has not run for quite some time despite the fact that there is a lot of frost on the unit
- The main board may signify an error signal when a defrost board fails to initialize
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