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Hello, one minute while I get some information together.
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Does the inducer motor come on? Also does the main blower run when you select FAN ON at the thermostat?
OK the inducer motor is the exhaust fan motor, the small fan does it come on?
It should have one?
Please disregard previous comments.Undoubtly the other expert is not familiar with your unit.These units were from days before induced draft motors.
As soon as thermostat calls for heat the igniter should glow and light burners, If it does not glow, our first step is to get a volt meter and check to see if we are getting 120v to the igniter..Below is a picture of a hot surface igniter.It will have 2 wire connected, We will unplug the wires from motor and check for 120v between the two wires.If we have 120v look at the igniter to see if it is burned or broken, See images below,We can go from here.