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Lennox G40DF-36A-070 Furnace Door Switch
The job of the furnace door switch inhibits the fan and ignitor being triggered to start so as to stop a potential explosion. You must have the device swapped out as quick as you can especially if you suspect it is not working properly.
Important hints your safety switch on the furnace door will need to be replaced
- The safety door switch appears as though it has been worn
- The furnace will not run even when you close the door
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