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Lennox XC21-024 Defrost Sensor Board
The defrost control board commences an important defrosting cycle which assists to defrost your outdoor unit. It relies on a temperature sensor located in the outdoor unit to agree when to begin.
What to see if the defrost board really needs to be replaced?
- The defrost feature will not initiate even though there is excessive frost that needs to be removed
- The primary control board may signify an error of some type produced by too much frost
- Most systems will not work due to the safety issue that the frost poses
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If you are going to be buying or ordering do your best and make sure of the correct model as well as make a visual comparison so that you are positive that the proper replacement defrost sensor board is the one being purchased. If you are not sure about installing the new defrost sensor board on your own then it is probably best to contact a professional to do the replacement of the part.
Feel free to download your manual for help.
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