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Carrier 58MSA080 Furnace Door Switch
The furnace door switch prevents the draft inducer and ignition sequence from turning on so as to stop a potential explosion. You must have the device changed as soon as possible if you see that it is broken.
General indicators that your safety switch on the furnace door is dying
- The safety door switch appears to be wrong
- The HVAC system will not engage even with the door closed
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