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Carrier FY4ANF042000 Defrost Sensor Board
The defrost control board instructs the system to activate the defrost cycle which aids to continue normal heating and cooling operations. The board is relayed information from a temperature sensor located near the condenser to decide when to initiate the defrosting cycle.
What warnings should I watch out for to know if my defrost sensor board is dying?
- The main board might give out a particular error code referring to the failed defrost sequence
- Defrosting has not run for quite some time despite the fact that there is quite a bit frost that makes the unit run like crap
- AC and heating system could not operate at all because of way too much frost build-up
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