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Does the main blower ever start? And do you have a meter so we can troubleshoot?
OK lets put the meter leads on motor wires and see if the 120v is dropping out or if we still have power to motor when it quits.
I am looking but do not have a wiring diagram.If there is a wiring diagram take me a picture of the label where I can follow wires to motor and other components and paste picture here.
Excellent job. Thanks. First we will check between the high voltage wire at transformer where blower gets power and the side of the fan switch towards motor
Is that same as here where you are testing?
Not really.I can not tell what goes or comes from where in pic. But it should be where to fan wires connect.We want to know if fan is getting power at time it stops.
Follow the fan wires from motor and show me where the hook up. Burners should shut down within a minute if fan stops.
I can see pics, but unable to race to motor