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Old 10-13-2010, 09:07 AM   #1
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Armstrong Ultra V induced draft fan


I understand that the induced draft fan is the first thing that needs to come on to start the heating cycle, but the fan doesn't ever come on. The control board is only about 4 months old. Help...

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Old 10-13-2010, 09:23 AM   #2
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Armstrong Ultra V induced draft fan


check the terminals where the fan plugs in for voltage when calling for heat

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Old 10-13-2010, 11:12 AM   #3
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Armstrong Ultra V induced draft fan


there is no voltage at the terminals during the call
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Old 10-13-2010, 11:20 AM   #4
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Armstrong Ultra V induced draft fan


Oh, I guess I should have mentioned that the green LED on the gas control valve (the diagnostic light?) flashes slowly and constantly (no apparent code).
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