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Lennox 42W43 Defrost Sensor Board
The defrost sensor control board instructs the system to activate the defrosting phase which aids to continue normal heating and cooling operations. The control board looks to a defrost sensor which is near the condenser somewhere, in order to agree when to initiate the defrosting cycle.
Clues to watch for to know your defrost board will die soon
- The whole system may stop running because of too much frost
- Defrosting never initiates even though there is excessive frost built up
- The main board may signify a particular error code referring to a bad defrost board
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If you decide on picking up or ordering a new Lennox 42W43 replacement part do your best and cross-check the correct model and also make a visual comparison in order to be sure the correct defrost sensor board is being ordered. There is no rule that says you have to install it yourself. Search for a pro in your community to replace the part.
Feel free to download your manual for help.
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