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Carrier 39-3SI Furnace Door Switch
A furnace door switch is a switch that prevents the vent fan and burner from turning on so as to stop a potential explosion. It is quite important to have it changed swiftly if it is not working in order to prevent injuries.
Main clues your furnace door switch has little life left
- The HVAC system will not even begin to start with the door closed
- The door switch looks as if it has been fallen off
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Before you decide on buying or ordering any Carrier 39-3SI replacement part do your best and cross-check the correct model as well as make a visual inspection in order to be sure the proper replacement furnace door switch is being ordered. Make safety your number one priority when you install any HVAC part. When in doubt call a pro. Stay safe.
Feel free to download your manual for help.
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