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    sycomore's Avatar
    sycomore Posts: 3, Reputation: 1
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    #1

    Oct 5, 2011, 08:14 PM
    Furnace short cycle
    I have a heil high efficient furnace that ignites fine but when blower starts gas valve shuts down
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Oct 6, 2011, 05:10 AM
    You might try cleaning flame senser with very fine sandpaper or steel wool
    sycomore's Avatar
    sycomore Posts: 3, Reputation: 1
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    #3

    Oct 6, 2011, 07:37 PM
    Gas valve actually cuts off just before fan starts up like fan limit is causing it. Fan limit is time delay. Could it be fan control or fan relay

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