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Fujitsu ASU18CL Furnace Door Switch
A furnace door switch is a switch that inhibits the fan and ignitor from activating so as to avoid injuries. Do not try to fix it, just have it exchanged for a new one as soon as possible if you suspect that it is not working.
Important signs the switch on your furnace door is going out
- The system does not begin to work even with the door closed
- The safety door switch looks like it is breaking apart
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