Flame out at Vent Opening

Discussion in 'Water Heater Forum, Tanks' started by billb5, Apr 27, 2012.

  1. billb5

    billb5 New Member

    Joined:
    Apr 27, 2012
    Location:
    Cali
    Hello;

    When my gas water heater fires up, there's sometimes a flash of flame at the vent opening where the vent pipe attaches and a sharp whop sound.

    I suppose what's happening is that the gas turns on but doesn't ignite right away; by the time ingition happens, there's gas built up. (Just like a gas stove will do.) Maybe it's a pilot light problem or a dirty burner?

    It's a GE model SG40T12TXK00 - a 40 gal, Ultra Low-NOx unit, less than a year old. I think this just started to happen.

    I keep the intake vents clean, so I don't think that's the cause.
    Any ideas?

    Thanks

    Bill
     
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