When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission.
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network
Lennox XC21-024 Furnace Door Switch
The furnace door switch is a safety switch which blocks the blower and gas ignition from turning on so as to stop a potential explosion. It is vital that this part be swapped out as soon as possible if you see that it is broken.
Some clues the switch on your furnace door is in dire need of a replacement
- The HVAC system does not even thing about starting with the door closed
- The switch is breaking apart
This site contains affiliate links for which I may be compensated
Feel free to download your manual for help.
This site contains affiliate links for which I may be compensated