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Carrier 42S Defrost Sensor Board
The defrost sensor board determines when to initiate the defrost sequence which aids to keep your outdoor unit from plugging up. The defrost board is relayed information from a defrost sensor that can be found near the condenser, in order to determine when the defrost cycle should begin.
Important clues of a deteriorating outdoor defrost sensor board
- Self defrost sequence never starts even though there is excessive frost on the unit
- Most systems will cease to function due to lack of airflow through the outdoor unit
- The main board may show a type of error code produced by a bad defrost control board
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If you are going to be buying or ordering a new Carrier 42S replacement part, do your due diligence and double check the model number as well as make a visual inspection so that you are positive that the correct replacement defrost sensor board is the one being purchased. There is no need to install the part by yourself. Look for a professional locally to do the job for you.
Feel free to download your manual for help.
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