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    daddyj's Avatar
    daddyj Posts: 4, Reputation: 1
    New Member
    		  
    #1

    Jan 4, 2009, 10:42 PM
    Coleman furnace
    I have a coleman furnace. The burner will turn on but shuts off after about one minute before reaching desired temp. Any idea why?
    Clough's Avatar
    Clough Posts: 26,677, Reputation: 1649
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    #2

    Jan 4, 2009, 11:25 PM

    Hi, daddyj!

    How old is the furnace as well as the thermostat, please? Its possible that the thermostat might be defective.

    Hopefully, others will also be along to address your question.

    Thanks!
    daddyj's Avatar
    daddyj Posts: 4, Reputation: 1
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    #3

    Jan 4, 2009, 11:38 PM

    Thermostat is new.Furnace approx 20 years old.
    cornerstonehvac's Avatar
    cornerstonehvac Posts: 26, Reputation: 2
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    #4

    Jan 17, 2009, 09:57 AM
    Does the Blower come on?
    daddyj's Avatar
    daddyj Posts: 4, Reputation: 1
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    #5

    Jan 20, 2009, 11:10 PM
    Quote Originally Posted by cornerstonehvac View Post
    Does the Blower come on?
    The blower comes on but then something is making gas valve shut off. Blower continues running for a couple of minutes then shuts off. I only seem to have this problem when out side temp. gets above 25 degrees. Colder than that it seems to work fine. Any ideas?
    cornerstonehvac's Avatar
    cornerstonehvac Posts: 26, Reputation: 2
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    #6

    Jan 21, 2009, 06:59 AM

    Is the Air filter clean? Does the gas burner come back on after the blower shuts down?
    daddyj's Avatar
    daddyj Posts: 4, Reputation: 1
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    #7

    Jan 21, 2009, 11:57 AM
    Quote Originally Posted by cornerstonehvac View Post
    Is the Air filter clean? Does the gas burner come back on after the blower shuts down?
    Air filter is new gas comes back on if I turn furnace off for a few seconds
    Brian s's Avatar
    Brian s Posts: 4, Reputation: 1
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    #8

    Sep 26, 2012, 07:03 PM
    Have you check gas press
    Burner Man's Avatar
    Burner Man Posts: 1, Reputation: 1
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    #9

    Sep 27, 2012, 12:59 PM
    If it has a new thermostat and it is digital, make sure it is set to oil /Gas on the back side of the thermostat. Some Digital Thermostats bought at places like Lowe's or Home depot require you to select oil/Gas or Electric on the back. This has to do with the heat anticipator if it is not set correctly it can shut the cycle down prematurely. Also if you have to turn the unit off then on to get it to run, that says that you are resetting a control. If it is a standing pilot system and the flame keeps going out and gas pressure is fine, then I would say Thermocouple is suspect. If it hasn't been serviced in awhile, the flues could be blocked up causing the system to go off on Spill switch or roll out switch, with the unit being 20 years old those switches may not be manual resetting but automatic switches that reset with disconnecting power then returning power. Sounds like you need a Contractor to look at it. Gas is no joke and not for the novice handy man (not doubting your talents) but if your not in the business it's best to have trained personnel look it over.
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