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International Comfort Products TNK075F14A1 Defrost Sensor Board
The defrost sensor board will determine when to initiate the defrost sequence which may be necessary to remove frost build-up that may accumulate. It relies on a temperature sensor located in the outdoor unit to verify when to initiate the defrosting cycle.
Some warnings the AC defrost sensor board is in dire straights
- The whole system may not run because of the frost blocking the flow of air
- Defrost session will not kick in despite the fact that there is a lot of frost on the outdoor unit
- The HVAC system control board could display a specific error code if the defrost board goes out
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