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    jimmygtp13's Avatar
    jimmygtp13 Posts: 6, Reputation: 1
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    #1

    Jan 16, 2007, 08:52 AM
    Goodman/Janitrol troubles
    Janitrol/Goodman furnace - The furnace is cycling on and off, all the way up until the blower should go on and then it cycles down and after a couple of minutes it begins to recycle.

    Sometimes the gas stays lit for 5 seconds and other times for a minute then when the blower turns on, the gas goes out. When it recycles 2 -3 times it sometimes works.

    I also noticed the vacuum hose coming from the pressure switch sometimes is clogged at the blower in the furnace. If I unclog the line it fixes the problem, but not always. I have replaced the pressure switch already.

    I have a Janitrol GMP075-3 furnace.

    Please help!
    NorthernHeat's Avatar
    NorthernHeat Posts: 1,455, Reputation: 132
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    #2

    Jan 16, 2007, 04:38 PM
    How old? Have it inspected please... The failure rate on a GMP075 over 8 years old is nearly 100%. Failed heat exchanger that is. Carrier is under a huge class action law suit and may not be able to be sold in 7 US states. I sure wish this happened to Goodman, 5 years ago. I have 5 service techs, averaging 6 calls per day, we condemned 3 out of 3 Goodman furnaces last week.
    jimmygtp13's Avatar
    jimmygtp13 Posts: 6, Reputation: 1
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    #3

    Jan 18, 2007, 12:02 AM
    The furnace is about 5 years old and it is 80 % efficient and it's natural gas. I keep finding the vent pressure switch vacuum hose is clogged at the fitting going into the blower. I need tips to dismantle and give it a thorough cleaning. I hope this would solve my troubles.

    Thanks for the input NorthernHeat!!
    NorthernHeat's Avatar
    NorthernHeat Posts: 1,455, Reputation: 132
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    #4

    Jan 18, 2007, 03:29 PM
    My guess is the problem lies in the pressure switch. There is a very small vent hole on the pressure switch very near the barb that the hose attaches to. If the inducer doesn't pull a little fresh air though the line all the time it is running, these nuisances are more prone to happen.
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