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    jond777's Avatar
    jond777 Posts: 1, Reputation: 1
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    #1

    Dec 12, 2016, 02:21 PM
    Draft inducer motor keeps cycling on and off
    Have a Goodman GMH8 furnace that is seven years old. The draft inducer motor goes on for about 2 seconds then shuts off and then keeps cycling until I shut the furnace off. It has been doing this for days. Its not the thermostat. I have seen this same post on here before but they never replied once it was fixed.
    Any advice would be greatly appreciated. Thank You.
    ma0641's Avatar
    ma0641 Posts: 15,681, Reputation: 1012
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    #2

    Dec 12, 2016, 02:39 PM
    First thing to do is to remove the inducer hose and make sure the ports are open. Check for leaks in the hose. The inducer switch works 2 ways. First, it must be open and then closes with pressure or vac depending on system. Make sure the vent (S) are open. I have seen birds, wasps and others plug the intake or exhaust vent pipe on 90% heaters. Make sure the vent pipe isn't constricted or plugged if a lower efficiency heater. I saw one unit where a tree branch collapsed the storm cover on the vent pipe. How many hoses on the switch? 1 for 80-85%, 2 for 90% or higher.

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