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  1. #1
    Fireside Member
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    Hot water heater issues

    Hello, I have a 2021 2600rb which had a thermo fuse blown. I direct wired it and the gas worked fine. Ordered new thermo fuses and when I replaced it, it would lite but not stay on. It would try 3 times lite then go off, then the dsi fault would go on. Any ideas? Thxs

  2. #2
    Site Sponsor
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    Low propane, propane tank excess flow valve tripped, propane lines need bleeding, flame sensor out of position or bad, flame out of adjustment or dirty orifice are a few ideas to check.
    John & Kathy
    2014 F250 Lariat FX4 6.2L SBCC
    2014 Reflection 303RLS
    SW Indiana

  3. #3
    Fireside Member
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    When I by pass the thermo fuse it works, so any propane feed issues or dirty orafice would not be the case.

  4. #4
    Setting Up Camp waynehurley5's Avatar
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    I'm new to rvs but I am a plumber never tore into water htr yet but your last statement correct but I believe if its on electric that means it would work off of element instead of burner bad element maybe I just haven't worked on my rv water heater yet just a thought hope it helps

    Sent from my SM-G960U using Tapatalk

  5. #5
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    Yes Wayne, it does work when on electrical. Cycles on off 3 times on gas then defaults. Thxs

  6. #6
    Setting Up Camp waynehurley5's Avatar
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    So its the gas side your having problems with if its doing that there should be a flame sensor clean it with steel wool and try again

    Sent from my SM-G960U using Tapatalk

  7. #7
    Setting Up Camp waynehurley5's Avatar
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    After it lights if gas valve does not detect flame and it will try afew times gas valve thinks no flame and shuts down

    Sent from my SM-G960U using Tapatalk

  8. #8
    Setting Up Camp waynehurley5's Avatar
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    Even if it lits gas valve thinks it didnt

    Sent from my SM-G960U using Tapatalk

  9. #9
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    I will try cleaning up but this is a brand new TT HW heater only has a few hours on it. Maybe a defective thermo fuse. I bought two of them, I’ll try the other also. Thxs

  10. #10
    Site Sponsor ExNihilo's Avatar
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    Just curious how did cleaning the flame sensor work? I have the same trailer and blew the thermal shutoff today. Bypass working- I have a few thermals on order (it seems more common than I would like). Hoping not to repeat your experience. I was a little concerned about how the wiring ran just below the vent for hot air, my wires were toasty, not melted but not far off. I added some heat shielding. I am not an electrician or plumber- nor do I claim to be bright, but that was "No Bueno" in my book.
    Thanks and I actually hope your issue is resolved.
    Ex-Nihilo
    2022 2970RL (Fabricated 1/4 Inch Bumper w/ RV Generator Boxes)
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    2021 RAM Longhorn 2500 Cummins 6.7
    Chattanooga TN

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