Results 1 to 12 of 12
  1. #1
    Join Date
    Apr 2001
    Posts
    24

    When the water gets to temp the pilot light goes out with the main burner. Any one know what causes this problem. I’m going to replace the valve (the heater is 10 years old).

  2. #2
    Join Date
    Oct 2003
    Location
    south Mississippi
    Posts
    185
    I noticed on my own unit at the house that the info on the side just rates the tank at 6 years(I think). Being as how you didn't say What type w/h you are referring to then I would ask is a ten year old heater worth the effort?

  3. #3
    Join Date
    May 2000
    Location
    Colorado flatland native
    Posts
    15,067
    Doubt it's the valve.......... Whaddaya do for a livin Smuty?
    My doctor gave me six months to live, but when I couldn't pay the bill he gave me six months more.
    Walter Matthau

  4. #4
    Join Date
    Apr 2001
    Posts
    24

    HVACR

    I was a sheet metal for 30 years at Inland Steel in East Chicago Indiana, retired January 31, 2003. Since 1975 I have done residential and light commercial HVACR. I now work at Purdue University North Central in the Physical Plant. Chillers 250 and 500 ton, 2 200 Horse Power Boilers, Air driers, water coolers 3 Leiberts.

  5. #5
    Join Date
    Apr 2001
    Posts
    24
    Changed the thermocouple and cleaned the pilot orifice. Pilot lights fine even with the old thermocouple. It’s when it gets to temp the pilot goes out. Good draft, in room with two 90+ furnaces with outside combustion air.

  6. #6
    Join Date
    Feb 2002
    Posts
    3,182
    Is this actually a "commercial" water heater or is it a smaller residential one?
    Does it use a thermocouple or is it actually a thermopile system?

  7. #7
    Join Date
    Apr 2001
    Posts
    24
    It a 60 gal heater with a 30 milli-volt thermocouple.

  8. #8
    Join Date
    May 2000
    Location
    Colorado flatland native
    Posts
    15,067

    Are the access panels in place?

    Could the draft be "sucking" the pilot out?
    My doctor gave me six months to live, but when I couldn't pay the bill he gave me six months more.
    Walter Matthau

  9. #9
    Join Date
    Apr 2001
    Posts
    24
    Flame looks ok when it shuts down.Only when it gets to temp.

    I just though maybe it is over heating, is ther a safety built into the valve

  10. #10
    Join Date
    Apr 2001
    Posts
    24
    Have to go to a class on PLC will check later.

    Thanks to all

  11. #11
    Join Date
    Feb 2004
    Posts
    2,468
    May be going off on ECO (stacking). Are there any water leaks on the hot side? With a small water leak i.e shower valve dripping can cause tstat to call for the burner to come on. Water temp will rise and open ECO dropping out pilot. Have you checked dropout on the power unit (magnet)?

  12. #12
    Join Date
    Feb 2002
    Posts
    3,182
    Whats the brand and model of this water heater?

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