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    power1966wagon's Avatar
    power1966wagon Posts: 2, Reputation: 1
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    #1

    Jan 26, 2007, 03:39 PM
    Furnace on the fritz
    Afternoon... first timer... was hoping someone has some furnace repair knowledge... Unit is a Carrier Updraft... Burner lights until its time for the blower to come on... sometimes it goes out exactually when blowers starts... other times it will stay lit 10/30 sec. after start of blower... blower runs normal run-time, but of course its blowing cold air... I changed thermostat... nothing changed... any ideas?. any help would be greatly appreciated
    Thanks again
    power1966wagon
    NorthernHeat's Avatar
    NorthernHeat Posts: 1,455, Reputation: 132
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    #2

    Jan 27, 2007, 10:58 AM
    Age and efficiency of furnace?
    power1966wagon's Avatar
    power1966wagon Posts: 2, Reputation: 1
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    #3

    Jan 27, 2007, 07:03 PM
    Thanks for the response... 1981... 80%
    Thanks
    NorthernHeat's Avatar
    NorthernHeat Posts: 1,455, Reputation: 132
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    #4

    Jan 28, 2007, 09:19 AM
    Does the furnace have a pilot light. Carrier uses what is known as an auto pilot which has 3 wires, white, green and yellow that come out of the pilot assembly. It doesn't sound like the burner is running long enough to trip the main limit so I would suspect the auto pilot is dropping out voltage to the main gas valve.

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