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Carrier 42D Defrost Sensor Board
The defrost control board will determine when to initiate the defrosting phase if necessary, to get rid of the frost that collects on the outdoor unit. The board relies on a defrost sensor located in the outdoor unit to ascertain when to initiate the defrosting cycle.
Signals to watch for in a bad defrost board
- The defrost sequence will not kick in despite the fact that there is a lot of frost in the way
- The whole system may stop functioning for the simple fact of the frost issue
- The main board might issue a specific error code produced by a failing defrost board
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Before buying or ordering do your best and cross-check the correct model and also make a visual comparison so that you are positive that the proper replacement defrost sensor board is the one being purchased. Once you have the part to install it yourself. Find a professional in your area to pay to install it for you.
Feel free to download your manual for help.
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