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Carrier 38TDB048 Defrost Sensor Board
The defrost control board determines when or if to start the defrost cycle which may be needed in order to defrost your outdoor unit. The board relies on a temperature sensor located in the outdoor unit to determine when to initiate the defrosting cycle.
Easy warnings your defrost board is going out
- Defrosting never begins especially when there is a rather large amount of frost on the unit
- The AC may not run due to way too much frost build-up
- The HVAC system control board might give out a particular error code when the defrost control board refuses to initialize properly
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