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    ameskf1's Avatar
    ameskf1 Posts: 1, Reputation: 1
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    #1

    Feb 17, 2010, 11:02 AM
    Rheem furnace will ignite, but burner will only go on some of the time.
    My Rheem Criterion model has stumped repair man. We have replaced the sensor, the gas valve and changed out a computer board. The heater will fire up some of the time. Most of the time it will go through the cycle of ignitor glow, burner kick on for a few seconds and go out, the blower works fine. Any suggestions?
    Tim99's Avatar
    Tim99 Posts: 9, Reputation: -2
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    #2

    Feb 17, 2010, 06:14 PM

    Sounds like you have a venting issue. Something has to sense that there is air flow in your vent. If it does not sense sufficient air flow in the exhaust, a relay will close the gas valve and shut off the burner. I had a vacuum switch on a boiler that gave me fits... same thing as you describe. I don't know what controls you have but I would check your vent.
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