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Carrier 58MTA120F10120 Defrost Sensor Board
The defrost sensor board commences the defrost sequence which assists to keep the outdoor unit free from frost build-up. The defrost board is relayed information from a specific sensor which is near the condenser somewhere, in order to verify when to begin.
Hints of a worsening defrost board
- Most systems will cease to operate for the simple fact of lack of airflow through the outdoor unit
- Defrost mode never kicks in even when there is a large quantity of frost on the outdoor unit
- The main board could signify an error of some type produced by a failing defrost board
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