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International Comfort Products HHP218AKA1 Furnace Door Switch
The furnace door switch blocks initial fan and ignition sequence being triggered to start in order to prevent injury and fire. You must have the device replaced at once especially if you suspect it is not working properly.
Subtle cues of a poorly performing safety door switch
- The whole system does not begin to work whether the door is off or on
- The safety door switch looks worn
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