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Thread: Gas Hot Water Heater-Temperature control

  1. #1

    Arrow Gas Hot Water Heater-Temperature control

    I own a Rheem gas hot water heater; temperature control dial is set to the lowest setting; water temperature still rises to a dangerous 150 degrees farenheit; Can the temperature control valve be recalibrated or replaced.

  2. #2
    In the Trades Gary Swart's Avatar
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    Yes it can and probably should be. Of course all of the electronics should be tested before just sticking new parts on and hoping for the cure. A plumber would be able to test everything and then make whatever repairs are necessary.

  3. #3
    Retired Defense Industry Engineer jadnashua's Avatar
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    Depending on the age, it might be under warranty. I'd give them a call. I'd also review the troubleshooting guide in the manual. If you don't have that, you can probably find it on their website.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  4. #4

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    Thanks for your prompt responses!

  5. #5
    Homeowner Thatguy's Avatar
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    Quote Originally Posted by jkcsanchez View Post
    water temperature still rises to a dangerous 150 degrees farenheit
    For adults this is a 3rd degree burn in 2 seconds.

  6. #6
    Retired Defense Industry Engineer jadnashua's Avatar
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    Quote Originally Posted by Thatguy View Post
    For adults this is a 3rd degree burn in 2 seconds.
    This is also why my city requires all new WH installations/replacements to have a tempering valve on the outlet. Now, those can go bad, too, but it's a secondary safety measure.

    Having the water that hot has some advantages IF you have a tempering valve...it makes it look like you have a bigger tanks, and will kill any bacteria that may be in the water. It costs more to keep it hot, though.

    Last edited by Terry; 08-06-2011 at 01:23 PM.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  7. #7
    Moderator & Master Plumber hj's Avatar
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    Default valve

    IT can be replaced, but should NEVER be recalibrated.

  8. #8

    Question

    Thanks everyone for the information provided. Since the unit is 8 years old, I've decided to install a new HWH.

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