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Lennox XC21-048 Defrost Sensor Board
The defrost sensor board will determine when to initiate the defrost cycle if necessary, to rid your unit of frost that can build up. It is influenced by a specific sensor located somewhere by the condenser to decide when the defrost cycle should begin.
Hints your outdoor defrost sensor board has to be replaced
- AC and heating system could stop working due to lack of airflow through the outdoor unit
- Defrost session never initiates even though there is a lot of frost in the way
- Your main control board may issue an error number when encountering a problem
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If you decide on picking up or ordering do your best and double check the model number as well as make a visual comparison so that you are positive that the correct defrost sensor board is being ordered. You do not have to replace the part all by yourself. Hire someone with experience in your town or city to pay to install it for you.
Feel free to download your manual for help.
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