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    countyman_1's Avatar
    countyman_1 Posts: 1, Reputation: 1
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    #1

    Jun 14, 2012, 06:44 AM
    Hot Water Heater Pilot will not stay lit
    A.O. Smith - Promax, Model# GCV 40 00L010000, Serial# B05J023194. Pilot went out, followed all instructions. Everything seemed to work correctly, but pilot would not remain lit. Auto pilot ignitor worked, while holding down On/Off/Pilot knob, pilot lit, held down for 1 minute, On/Off/Pilot knob popped back up, but pilot would not stay lit. Tried several times.
    Handyman2007's Avatar
    Handyman2007 Posts: 988, Reputation: 73
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    #2

    Jun 14, 2012, 06:50 PM
    Quote Originally Posted by countyman_1 View Post
    A.O. Smith - Promax, Model# GCV 40 00L010000, Serial# B05J023194. Pilot went out, followed all instructions. Everything seemed to work correctly, but pilot would not remain lit. Auto pilot ignitor worked, while holding down On/Off/Pilot knob, pilot lit, held down for 1 minute, On/Off/Pilot knob popped back up, but pilot would not stay lit. Tried several times.
    The pilot has a flame detector on it that keeps the pilot lit once it sees a flame. Sounds like the flame detector is bad. Could also be the regulator,, that is where the flame detector connects. I would change the pilot assembly
    drtom4444's Avatar
    drtom4444 Posts: 3,282, Reputation: 145
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    #3

    Jun 15, 2012, 08:38 AM
    That model has a thermocouple according to what I saw on the company web site; therefore, you need to replace the thermocouple and when you install the new one make sure that only 3/8" of tip is in the flame. No more than that or it will fail.
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