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Carrier FV4BNF003000 Defrost Sensor Board
The defrost control board determines when or if to start the defrosting phase which actually helps to keep your outdoor unit from plugging up. The board looks to a temperature sensor that can be found near the condenser, in order to make the decision on when the defrost cycle should begin.
Key clues of a poorly working Carrier defrost sensor board
- The main board may issue a type of error code when encountering a problem
- Your HVAC system will stop operating at all because of frost blocking the fins on the outside unit
- Unit defrost session never kicks in even though there is a large amount of frost on the outdoor unit
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