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Carrier 50XL-A36 Defrost Sensor Board
The defrost sensor board will determine when to initiate the defrost sequence which may be needed in order to keep the outdoor unit free from frost build-up. The board relies on a specific sensor located in the outdoor unit to verify when to begin.
What symptoms are present when the outdoor defrost sensor board really needs to be replaced?
- The control board may issue an error of some type produced by too much frost
- Defrost mode has not run for a while even though there is a lot of frost on the outdoor unit
- The system may cease to function because of the fact that there is too much frost
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