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Lennox CB27UH-048 Furnace Door Switch
The furnace door switch is a safety switch which inhibits initial fan and burner being triggered to start so as to stop a potential explosion. It is quite important to have it exchanged for a new one as quick as you can if you see that it is broken.
Important red flags of a laboring switch on the furnace door
- The furnace door switch appears to be breaking off
- The whole system will not run whether the door is off or on
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