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I Can’t Keep Pilot Light Lit On Water Heater?

I am able to light the pilot on the water heater, but every time I turn the knob to the “on” position the pilot goes out. What am I doing wrong?

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  1. Comment by pete0518
    November 14, 2009 @ 9:54 am

    You have to replace the thermocouple that goes to pilot.
    Thats the copper tube that goes from control valve to the pilot flame end. Can be bought at Home Depot (Honeywell or Robertshaw 24″ Thermocouple)

  2. Comment by HyperDog
    November 14, 2009 @ 4:28 pm

    Are you leaving it in the “Light” position long enough to heat up the thermocouple? Some of them can take a minute to warm up enough to hold the valve open.
    Also, if the flame doesn’t hit the thermocouple (small cylindrical thing) well enough to get it good and hot, that might be part of the problem as well. Sometimes the pilot orifice gets clogged, or the pilot is misaligned, or if there’s a deflector it might be bent or mis-positioned so the flame doesn’t bathe the thermocouple.

  3. Comment by the magic 8-
    November 14, 2009 @ 7:26 pm

    you’ll have to install a new water heater if it’s not your thermocoupler ….sounds like the gas valve is no good

  4. Comment by brown eyes
    November 14, 2009 @ 11:13 pm

    I had that problem too…replace the thermocouple..it is easy to do..

  5. Comment by Dogzilla
    November 15, 2009 @ 3:06 am

    Pilot lights have a thermocouple. Yours has gone bad.

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