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Lennox 90UGF Series Furnace Door Switch
The furnace door switch is a safety switch which inhibits the draft inducer and burner from turning on in order to prevent injury and fire. It is important to get the part switched out ASAP if you suspect that it is not working.
Warnings of an inadequate switch on the furnace door
- The safety door switch appears as though it has been wrong
- The HVAC system will not fire up even when you close the door
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If you are going to be buying or ordering a replacement furnace door switch for your Lennox 90UGF Series, do your due diligence and cross-check the model number and also make a visual inspection in order to be sure the proper replacement furnace door switch is the one being purchased. There is no rule that says you have to replace the part all by yourself. Hire someone with experience in your community to pay to install it for you.
Feel free to download your manual for help.
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