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Carrier 39LB Defrost Sensor Board
The defrost sensor control board determines when to initiate the defrost cycle which actually helps to keep the outdoor unit free from frost build-up. The board is influenced by a sensor located somewhere by the condenser to make the decision on when the defrost cycle should begin.
Cues poorly running defrost sensor board
- The main board may issue an alphanumeric error code when the defrost control board refuses to initialize properly
- Air conditioning may not run due in part to the fact that there is too much frost
- Defrost session has not run for a while despite the fact that there is a lot of frost that makes the unit run like crap
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Before buying or ordering any Carrier 39LB part do your best and cross-check the model number as well as make a visual comparison so that you are positive that the right defrost sensor board is the one being purchased. You do not need to replace the part all by yourself. Consult with a professional in your community to replace the part.
Feel free to download your manual for help.
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