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Old 11-08-2010, 12:04 PM   #1
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Concord Furnace 90 plus 8497L23077


Circuit board 3 years old only thing that runs is the big blower motor. Prior to shut down it seemed to cycle 4 or 5 times then shut down then short time later go through it again sometimes staying on sometimes not. Is this a sign of a bad relay on the board?

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Old 11-08-2010, 01:31 PM   #2
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Concord Furnace 90 plus 8497L23077


use a vm and check where you are loosing 24v when it shuts down. May or may not be board

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