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Carrier FV4CNB005 Furnace Door Switch
The job of the furnace door switch blocks initial fan and ignition sequence from activating so as to stop a potential explosion. It is crucial to have this part traded for new one as soon as you can if you see that it is broken.
Important hints your furnace door switch is going to die
- The system does not run with the door closed
- The door mechanism is broken completely
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Before buying or ordering any Carrier FV4CNB005 part do your best and double check the model number as well as make a visual comparison so that you are positive that the right furnace door switch is the one being purchased. HVAC professionals may have higher labor rates than others so you may want to ask around to find a good deal if you want to pay bottom dollar.
Feel free to download your manual for help.
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