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Friedrich MW12C1H Defrost Sensor Board
The defrost sensor board initiates the defrosting phase which helps to keep the outdoor unit free from frost build-up. The defrost board is relayed information from a sensor located in the outdoor unit to ascertain when the defrost cycle should begin.
Indications of a defective defrost sensor board
- Defrosting has not run for quite some time even though there is excessive frost on the unit
- The main circuit board could signify a particular error code if the defrost board goes out
- The whole system may cease to function for the fact of frost blocking the fins on the outside unit
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