Pilot light will not stay lit.

Discussion in 'Water Heaters and Softeners' started by jeff, Feb 19, 2012.

  1. Feb 19, 2012 #1

    jeff

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    Hello All, I've been troubleshooting this for the past three weeks. apollo water heater approx three years old. pilot light seems to go out whenever the main burner shuts off. First fix attempt, I removed the burner and pilot assy, cleaned, and blew out lines, put back on and worked great for about two days. Second attempt, replaced pilot light assy, once again, worked for about two days. pilot light lights up fine, and if I leave it at a low temp, without the main burner coming on, the pilot light stays lit indefinitely. When I manually turn the temp up, causing the main burner to come on and than turn the temp back down so the burner goes out, the pilot light will stay lit. It seems to only go out when the burner shuts off automatically after water reaches correct temperature. Checked air vents on bottom of tank and they are clean. If anyone has a suggestion on what the problem might be, please let me know, Thank You.
     
  2. Feb 19, 2012 #2

    havasu

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  3. Feb 20, 2012 #3

    Another-Plumber

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    post a pic of the base of the heater if you can, ill solve it for you
     
  4. Feb 20, 2012 #4

    LiQuId

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    thermocouple for sure..
     
  5. Feb 20, 2012 #5

    jeff

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    Replaced the thermocouple with the pilot assy.
     
  6. Feb 20, 2012 #6

    johnjh2o

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    There was a problem with some of the newer gas heaters. They get there combustion air from under the heater through a filter. These filters after time, depending on the location of the heater would become plugged. They have a brush that is used to clean these filters.

    http://www.statewaterheaters.com/cust/FVIRCleaning.pdf

    John
     
  7. Feb 20, 2012 #7

    jeff

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    Checked filters at bottom of tank and they are clear
     
  8. Feb 21, 2012 #8

    LiQuId

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    so, is it working ?? or is the problem persisting ?? we're kinda in the dark .
     
  9. Feb 21, 2012 #9

    jeff

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    still not working, the only time it works for longer than a day is when I remove the pilot, burner and thermocouple from the valve and put them back on, then it works for a day or two and than the problem starts reoccuring.
     
  10. Feb 21, 2012 #10

    Another-Plumber

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    post a picture of the base, with the front sheild cover off
     
  11. Feb 21, 2012 #11

    havasu

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    Have you replaced the thermocouple or just readjusted it? They do go out quite a bit.
     
  12. Feb 21, 2012 #12

    jeff

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    Replaced it, will add some pics when I get home tonite
     
  13. Feb 21, 2012 #13

    jeff

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    here are the pics

    2012-02-219510.17.25.jpg

    2012-02-219510.34.25.jpg

    2012-02-219510.34.45-1.jpg
     
  14. Feb 22, 2012 #14

    Another-Plumber

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    see below...
     
    Last edited: Feb 22, 2012
  15. Feb 22, 2012 #15

    Another-Plumber

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    ha, ha thats an OLD AO smith type, its much more than 3 years old, yes my friend, the filter needs cleaned correctly... you can thank me anytime..
     
  16. Feb 22, 2012 #16

    Another-Plumber

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    look dude, ill cut to the chase so you can wake up tommorrow with hot water, if this doesnt work you can come down to San Diego and slap my momma.... remove everything again, the thermocoupling, burner, etc... take a toilet scrub brush, preferred a clean one, and scrub the filter inside the burner chamber, back and forth for like 20 strokes. wipe out all the dust and crud with a shop vac or with a damp rag... reinstall all the pieces you took off... and belive me, when you wake up tommorrow youll get on here and thank another plumber, lol
     
  17. Feb 22, 2012 #17

    johnjh2o

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    I agree with Another-Plumber. I have been saying from the beginning that it was the filter. I even supplied a link showing how to accomplish this. AO Smith was one of the worst for this problem. There should have been a recall on them.

    John
     
  18. Feb 22, 2012 #18

    Another-Plumber

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    most def john, rumor has it, AO smith knew about the problems with their WH and never admitted it, i have had many issues with them giving me the Big Business run around, they have about 20 excuses why the WH wont work. even some BS to how high the vent is extended from your roof, really? what does a vent have to do with the pilot staying on? I have been taking my business to Bradford-White ever since 2004 or so...
     
  19. Feb 22, 2012 #19

    Another-Plumber

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    oh, and another thing johnjh20, i agree with what you said up top, "They get there combustion air from under the heater through a filter. These filters after time, depending on the location of the heater would become plugged. They have a brush that is used to clean these filters." its easy for me to solve a problem if i can only see with my own eyes what the customer/poster is talking about....
     
  20. Feb 23, 2012 #20

    LiQuId

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    Thermocouple was an easy suggestion, and if it didnt work then I would definatelly Agree with AP and John, I hadnt known about this issue with the Ao Smiths but do now So I tip my had to these 2 for what I've learned today.

    :)
     

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