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Carrier 40MFC018 Defrost Sensor Board
The defrost control board instructs the system to activate the defrosting phase which actually helps to defrost your outdoor unit. It is relayed information from a defrost sensor that can be found near the condenser, in order to make the decision on when to initiate the defrosting cycle.
What happens when my Carrier defrost sensor board is almost dead?
- The HVAC system control board may show an error of some type produced by a failing defrost board
- Defrosting never begins even though there is a lot of frost built up
- Your HVAC system will not operate because of way too much frost build-up
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