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Posted on Jan 17, 2009
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Coleman presidential II furnace blower on and off

When the burner lights the blower doesn't stay on -- it cycles on and off. this is a natural gas furnace.

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Scott Magill

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  • Expert 70 Answers
  • Posted on Jan 17, 2009
Scott Magill
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Sounds like the flame sensor. But it could be the thermostat. Is the furnace standing pilot or electronic spark or hot surface ignition. I would start by checking thermostat. Turn power off to furnace take thermostat off wall and take wires marked r & w and connect them together. Turn power back on if furnace works then change out thermostat.Most eclectronic ignition Furnaces have a flam sensor, You could take flame sensor out and clean it up with steel wool or wire brush. If you need anymore help just reply back .

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