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Lennox G40DF-48B-070 Furnace Door Switch
A furnace door switch is a safety feature that stops the vent fan and burner from switching on so as to stop a potential explosion. You must have the device traded for new one as quick as you can if it is defective in some way or another.
Major symptoms of a worsening furnace door switch
- The door switch seems to be eroded
- The whole system will not fire up with the door closed
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If you decide on picking up or ordering a new Lennox G40DF-48B-070 replacement part, do your due diligence and cross-check the correct model as well as make a visual inspection so that you are positive that the correct furnace door switch is the one being purchased. Use a great deal of caution when installing or replacing an HVAC part. If you are unsure about the installation then you should call a pro. Stay safe.
Feel free to download your manual for help.
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