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    wakemasterx's Avatar
    wakemasterx Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Dec 1, 2009, 07:47 AM
    Janitrol GUPI100-4 ignites, but won't light
    Just like the title says, I have a janitrol gupi 100-4 that will power up, and ignite for 5-10 seconds, but the burners? Will not light up. Not sure what to check, any advice?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 1, 2009, 09:37 AM
    Clean flame sensor if so equipped. Then check to see if 24 volts is being applied to the gas valve during the start process.
    wakemasterx's Avatar
    wakemasterx Posts: 3, Reputation: 1
    New Member
    		  
    #3

    Dec 1, 2009, 10:06 AM
    I don't see any kind of sensor in there. I have plenty of juice, and a big (1-1.5 inch each side) ignition flame coming out for 10 or so seconds. Seems like there is no gas going into the "tubes" for the ignitor to light. Sorry I don't know any of the names of these things.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #4

    Dec 1, 2009, 12:57 PM
    Then check to see if 24 volts is being applied to the gas valve during the start process.
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