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  1. #1

    cradom's Avatar
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    Any plumbers here?
    I have a water heater that's probably 2 1/2 years old. I changed the thermocouple last year. Just had to change it again .
    How long should those last? Every year doesn't sound right. I would think 3 to 5 years minimum.
    Anyone?
    Always listen to experts. They’ll tell you what can’t be done and why. Then do it!
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  2. #2

    JohnCL's Avatar
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    No plumber, but it should last longer than that. My first one went 10 years, and I replace it last year. Did you have a nice large loop on the extra tubing? (If you had any). How much of the tip is in the flame? Good blue pilot?
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  3. #3

    cradom's Avatar
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    It was slightly longer than the original but not so long it was looped. It's pre-adjusted as far as amount in flame. Yup, good blue flame.
    This is a Whirlpool we bought not too long ago. And installed by a plumber (I don't solder anymore... copper pipes).
    Always listen to experts. They’ll tell you what can’t be done and why. Then do it!
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  4. #4

    chscag's Avatar
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    I agree with John. My previous one went 12 years before it needed replacement. Sounds like Whirlpool may be using cheap imported parts?

  5. #5

    cradom's Avatar
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    Probably, although the first replacement wasn't Whirlpool. This one is a Honeywell, maybe will last longer.
    Always listen to experts. They’ll tell you what can’t be done and why. Then do it!
    -Lazarus Long

  6. #6

    dtravis7's Avatar
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    I agree with the others here. 10 Years plus typically.

  7. #7

    pigoo3's Avatar
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    Quote Originally Posted by cradom View Post
    I have a water heater that's probably 2 1/2 years old. I changed the thermocouple last year. Just had to change it again .
    How long should those last? Every year doesn't sound right. I would think 3 to 5 years minimum.
    Anyone?
    Do you have any special water chemistry in your area that may be affected things? Do you you have the temp setting super hot (what temp do you have it set at)?

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  8. #8

    cradom's Avatar
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    Just curious, why would the temp setting affect it? All it does is keep the pilot light lit.
    Do you mean cycles? That would be the main burner.
    As far as water, it's slightly hard, not enough to need a softener.
    Always listen to experts. They’ll tell you what can’t be done and why. Then do it!
    -Lazarus Long

  9. #9

    dtravis7's Avatar
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    I replaced the thermocouple also in my Wall heater at the other house. It was going strong when I moved out 12 years later. All it does it keep the pilot going. The Flame of the Pilot is what keeps it warm.

  10. #10


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    Dumb question? natural gas or propane? If ng, off utilities or well head?

  11. #11

    chscag's Avatar
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    We're talking about Texas, partner. Natural Gas of course! There's no way I would use propane tanks for gas unless there was nothing else available. Too doggone expensive.

  12. #12


    Member Since
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    Just curious, sometimes people with farms or opportunities to get free gas from well heads have to deal with impurities, which can cause more than usual problems. Most gas connections have a drop prior to the connection to the heater. Turning of the gas and removing the plug to check for fluids wouldn't hurt. You're more likely to get this with well head hookups. Not to mention utility line hook ups also, especially if you're on the end of the line.

  13. #13

    JohnCL's Avatar
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    Hey Craig, did a little more digging on this and found that most folks agree that the thermo's purchased at the big box stores are crap, including Honeywell. I also found that replacing a water heater with a thermo for an HVAC system will yield better life results of the part.

    I got mine from a dedicated HVAC supply company that was local, so maybe those are better quality.

    Good luck!
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  14. #14

    cradom's Avatar
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    Well, got this one at local hardware store (not big chain) it was all they had. If it goes bad I'll look up the guys at the AC shop.
    Funny though, I've never had this problem before. 'Course, everything is cheap nowadays. (made in China)
    Thanks guys!
    Always listen to experts. They’ll tell you what can’t be done and why. Then do it!
    -Lazarus Long

  15. #15

    cradom's Avatar
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    Sorry for reviving an old thread but...
    Guess what I just had to do --- AGAIN!
    This is getting old.
    Always listen to experts. They’ll tell you what can’t be done and why. Then do it!
    -Lazarus Long

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