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International Comfort Products PH5560AKA1 Furnace Door Switch
The job of the furnace door switch blocks the draft inducer and gas ignition from switching on so as to stop a potential explosion. You should have the switch be changed promptly especially if you suspect it is not working properly.
Major warnings your furnace door switch has very little life left
- The furnace door switch appears to be fallen off
- The HVAC system does not begin to work whether the door is off or on
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