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Tripp Lite SRCOOL33K Furnace Door Switch
A furnace door switch is a switch that blocks initial fan and ignition sequence from switching on so as to stop a potential explosion. You should have the switch be switched out immediately if you can, if it is causing you problems.
Some warnings of a poorly working safety furnace door switch
- The switch appears to be broken
- The furnace will not begin whether the door is off or on
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