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International Comfort Products H9MPD100J20A1 Furnace Door Switch
A furnace door switch is a switch that blocks the vent fan and ignition sequence from activating so as to avoid injuries. It is crucial to have this part switched out immediately if you can, if you suspect that it is not working.
General warnings of a laboring switch on the furnace door
- The HVAC system does not run whether the door is off or on
- The furnace door switch has been bent
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