Rheem 80 Plus not working

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Old 10-13-08, 09:29 AM
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Rheem 80 Plus not working

My Rheem 80 Plus Furnace from about 1985 is not starting when the thermostat turns system to on.



The part that looks like a solenoid(B) buzzes loudly when switched on. I previously put in a new exhaust fan(E) and vacuum hose when the old squirrel cage rusted out. I have an second identical system so I swapped parts to see if I could diagnose the problem. I tried swapping the board that has (A) and (B) and then the board that has (C) and (D). Neither worked. Anyone have any ideas?

Your suggestions would be greatly appreciated.
Thanks,
Greg
 
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Old 10-13-08, 12:56 PM
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I have pretty much the same furnace (although with a different gas valve). Describe exactly what is happening upon a call for heat. By the way, where did you get the replacement induced draft (exhaust) fan?
 
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