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Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your
issue. First I’ll need some more info so I have a more complete picture of you situation.
What is the brand and model number of your furnace?
Ok, what is the flash sequence on the LED's on the control board?
Please answer my last question. What are the LED's on the board doing?
There are 2 LED's are they both flashing? only 1? which one? flashing fast or slow?
You can't troubleshoot this unless you're there. All I can do now is tell you if you have constant 120 v to the draft fan and it isn't running you either have a bad connection or a bad fan
I'm online until ~ 7 pm EST. I do take breaks. I'll respond as soon as I can
Ok, get back to me when you're onsite with a multi-meter.