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Mitsubishi MSZ-FE12NA-8 Defrost Sensor Board
The defrost sensor board determines when or if to start the defrost sequence which helps to continue normal heating and cooling operations. The control board looks to a defrost sensor located near the condenser to determine when to begin.
What warnings are present when my AC defrost sensor board is not working right?
- Defrosting never starts despite the fact that there is a lot of frost on the unit
- The control board may issue an error number referring to a failing defrost control board
- The whole system may cease to function due to the amount of frost on the outdoor unit
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