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Friedrich MW12Y3H Furnace Door Switch
This switch prevents the draft inducer and ignitor from starting so as to avoid injuries. You should really have it swapped out as quick as you can if it is causing you problems.
Hints of an ailing switch on the furnace door
- The system does not run whether the door is open or closed
- The switch has been broken badly
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Before buying or ordering a new Friedrich MW12Y3H replacement part, do your due diligence and make sure of the correct model and also make a visual comparison so that you are positive that the correct furnace door switch is the one being purchased. HVAC professionals may charge higher prices than others so you could call around to find a good deal if money is a concern.
Feel free to download your manual for help.
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