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Old 10-05-2011, 01:58 PM   #1
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I have a coleman furnace model # DGAT090. The diagnostic lite is flashing 5 times / gas valve engergized with no call for heat. Any answer for a fix to this concern?
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Old 10-05-2011, 02:43 PM   #2
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I have a coleman furnace model # DGAT090. The diagnostic lite is flashing 5 times / gas valve engergized with no call for heat. Any answer for a fix to this concern?

New control board.
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Old 10-05-2011, 07:19 PM   #3
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Grounded flame sensor or its wire will do that too.
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Old 10-06-2011, 02:25 PM   #4
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Grounded flame sensor or its wire will do that too.
Where might I look for the flame sensor / wiring?
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Old 10-06-2011, 02:28 PM   #5
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New control board.
Is there a way to verify if its the control board. Quite a pricey part to try to see if it fixes the problem.
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Old 10-06-2011, 05:31 PM   #6
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Should be 3 wires going into the burner. Disconnect the wires and check for continuity to the burner. If there is then you get to the fun part of removing the burner from the heat exchanger without breaking the fragile as an egg ignitor.
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