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Please give me complete model on furnace and tell me what exactly happens on call for heat.Also does fan run non stop when not calling for heat?
Let me see if I have access to wiring diagram on furnace
I can not find manual on the furnace so I am going to open to other experts who may be able to assist with better accuracy rather that just tell you to start changing parts which would be less than professional and a guess at best without doing some troubleshooting.Please wait to see if someone is available more familiar with your unit.Replying will send this back to my desk and delay the process of getting an answer to your question.