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Hathalm's avatar
Hathalm
Explorer III
Aug 03, 2026
Solved

Why no hot water?

Hi.  Mine is a Forest River Flagstaff Classic. 

It’s lovely. 

But there is no hot water. I’m sure it has inline water heater. I turn it on at the panel, it lights blue, run “hot” water…but no hot water comes out. Result:  Cold me.

i have water in my tank. But I’m also hooked up. I see no error…just no hot water.

 Then I go back and in the panel, it has turned red.  I turn it off.

Methinks this is not the Way.

 Ideas. 

  • ELECTRIC HOT WATER HEATER SOLVED!!!

     My electric hot water heater never worked in my 5th wheel.

    i coordinated with y’all great guys here, got ideas for winterizing, maybe it’s bypassed, burnt out, broken wire…

    I worked with the service manager at the dealership…

    then I went to an rv place, who couldn’t help me, but they referred me to a man who comes out to the RV Park, mobile repair tech.

     He was very knowledgeable, began testing…. The element was NOT burnt out, but there was no electricity to it. He checked the control panel, the breaker box… electricity should be there.

     He opened the wall cabinet in the head and began searching—AND THERE WAS THE PROBLEM:   

    the electric water heater was not plugged in.

    Ugh!!!    It was inside the wall. I’d have never found it

    Here plugged it in.

     

     It works.  

30 Replies

  • Hello all you wonderful patient people!!  Good to have you.  

    Water heater never worked.  This is a one month old Forest River Flagstaff Classic 290CFK 5th Wheel.

    Here is my update. Please consult this photo

    It is a Suburban, Model L, water heater. I’m told, it has no switch to turn the electric pump off. Just the control panel inside. This box also runs the lp system, which works. The ELECTRIC WATER HEATER never worked. I’m told it is NOT BYPASSED because that water pressure release valve at top will spew water if you open it, which also means the 12 gallon water heater tank full.

    i finally reached the service manager at my dealership whose concussion is that 1. Cannot replace this water heater, 2. Must hire a smart mobile mechanic to come to me and test things, looking for some wire that is broken or faulty control panel or something.

    My first Forest River also drove me nuts. 

    i’m just gonna have to use lp until I get a genius to search it out.

    I ought to have a working electric water heater.

    • bid_time's avatar
      bid_time
      Navigator

      The electric water heater element should be under that big black cover with the 3 screws in it on the bottom left. Turn the electricity completely off, remove the black cover, remove the two wires, and test the element with an ohm meter. You can look up how to test an electric water heater element on the internet. To change it, with the electric still off, drain the water heater, get the proper size socket, unscrew the old one, screw in a new one, replace the wires and cover, and you’ll be good to go. There are videos for this online.

      Do not ever turn on the electric heater element until that water heater tank is full of water. Check it to be sure. If you do turn it on when there is no water in the tank, you can go out and buy another new one and replace it again.

      One more thing, the electric water heater element will only work when you are plugged in to 120v electric.

      • way2roll's avatar
        way2roll
        Trailblazer

        I'm with you. I think the electric element is bad. Simple fix. I'd certainly try that before I spent money on a technician. 

  • ok so aparently you have a 12G tank waterheater.  both electric and gas.  so you should have a square metal access on the outside that will look like this.  that will tell you where it is from the outside, so go inside and find the aproximate area and open cupbords and see if you can see it.  in a lot of units they will have a finnish panel on the inside that has a couple screws holding it in place you may have to remove thoes if it is behind a panel like mine.  from there THIS is a good video from the forest river video library.  

     

    • Hathalm's avatar
      Hathalm
      Explorer III

      Does this image of my water control panel help?

      I have it set for city water. It’s NOT on winterization, which I think would bypass the electric water heater.

       So I’m guessing my electric water heater is not bypassed.

      • StirCrazy's avatar
        StirCrazy
        Moderator

        no doesnt help at all, that is for filling not using, it doesnt matter if you have it running from the tank or off city water if the hot water tank is bypassed you won't get any hot water

    • Hathalm's avatar
      Hathalm
      Explorer III

      Hi StirCrazy,

      i have been coordinating with my dealership sales person, trouble shooting. I am in full hookups, have electricity, my lp tanks are full. 12 gallon water heater tank is full.

      Lp water heating works fine.

      Electric water heating: no heat, yet.

      i need to check for bypass setting electric water heater.

       Thank you For that exterior cover pic.

      i will try to locate interior access to elec water heater.  I tell you: I bought this 5th wheel new in a hot climate where it doesn’t get cold in winter. They never mentioned bypass when I bought it, and I can’t think why anyone would winterize it.  Yet, maybe it left the factory bypassed. Glitches happen. 

      will check.

      • StirCrazy's avatar
        StirCrazy
        Moderator

        ok so it works fine with propane?  then it is not bypassed and there is something wrong with the electricity or you have a second switch you have to activate it.  that cover I sent you a picture of open it up and see if there is a electrical rocker switch in there.  all the units I have had, had the main switch for putting it on inside the unit and a secondary isolation switch on the water hearter its self so you could turn that off and not be able to start it on electricity by mistake.  

  • It's also helpful to return to the forum to check responses and report back if you found a solution.

  • I would personaly be the winterization bypass valve/s are in the by pass mode so you start it up but there is no water in the hotwater tank so it errors out.  I hope you have been trying to run it on propane as if you have been starting the electrical element dry that will most likly need to be replaced now.  

    • way2roll's avatar
      way2roll
      Trailblazer

      Isn't that almost exactly what I said?

  • Aside from the bypass like Bid_time mentioned, are you running your water heater on lp or electric? In either case, the lp could be shut off, or on electric you may have burnt up the element. If you turned the water heater on electric before it filled with water the element will burn out. 

    • Hathalm's avatar
      Hathalm
      Explorer III

      Im a 2026 Forest River Flagstaff Classic, 5th wheel. I tow well, and I’m usually fine when camping with hookups, but there is never any hot water.

      Youtube videos I find are general and don’t help. I don’t know where my hot water tank is, if I have one. I don’t know how to fill or bypass.

      I don’t know if my inline water heater is on lp or electric. I see no switches to select. In my appliance panel box, I can touch for heated water, it turns blue, then red…but nothing happens. I turn it back off. 

      i was told nothing about this when i bought. (I wasn’t even told how to close the front door. It wouldn’t close and lock from the inside. It was impinged by the exterior steps frame at the bottom of the door jam. Examining it, I found extenders on the end of the steps holding the steps too high, so the part at the bottom of door jam raised a bit. Then the bottom of the door banged on it.  I adjusted the step extenders and now the door closes easily, properly. 

      things like that I never got at the dealership.

      so, now I’m trying to figure out how to get hot water, just want it for the shower.

      i get from too-general YouTube videos that there is an inline water heater and likely a hot water heater tank. I don’t know if this camper has ever been winterized. I think not, as I bought it in a hot climate, and they didn’t mention it. Of course they didn’t mention the system as a whole, either.

      i don’t find a switch. I’ve scoured the bottom of the camper and I think I know what all the pull valves do. I have none left that could apply to a hot water tank.  So maybe the switches for the hot water tank are inside? I find switches or panels for breaker box, appliances, solar panel, thermostat. that’s all.

      i’m just thoroughly flummoxed. I feel like Samantha Stevens without magic, or her lovable yet dippy aunt. I feel like super woman or super dog without a yellow sun…

      I’ve texted my sales agent at the dealership, haven’t heard back yet. Will text again.

      i called Camping World, but the first thing they asked was. Did you buy it here? I answered no, elsewhere. They said they have a 2-month waiting list, and they’d need me to bring the camper in. They refused to talk with me, if I come in to talk with some knowledgeable service guy, as all they service people are working. I think talk would inspire me.

      For general inside heating, I can buy a little $20 electric heater. It’ll do fine. 

      is just a warm shower that I need, especially as we approach winter.

      I’m not actually stupid, though I may get an award for it here. I’ve accomplished a lot in life. But the water heater thing is confounding for me. Perhaps I need a dimensional shift, a genie, a sorcerer’s stone, or a simple brain transplant.

      • stevenal's avatar
        stevenal
        Nomad III

        If you have a gas powered WH, you'll have a vented door on the outside that looks something like [external link removed by mod - kindly add an image instead]

        If someone turns the switch on while you stand near the door, you should hear a click as it sparks to ignite, followed by the sound of the burner. It may take 45 minutes or so to get hot water. The bypass valving should be inside behind this area. I need to remove drawers to get to mine.

  • Are you familiar with the process for by-passing the water heater? By-passing the water heater is done in cold climates so that antifreeze can be pumped through the rv water system without filling the water heater with antifreeze (this is necessary so the lines don’t freeze and break). The point being, the by-pass valves need to be in a specific position to accomplish this by-pass mode. If those valves are currently in by-pass mode, you won’t get any hot water. If you don’t know about “by-passing”, google it and read up.

    • Hathalm's avatar
      Hathalm
      Explorer III

      Hi all,

      i am not familiar with winterizing or bypassing.  That is reasonable. Though i bought this thing new in a hot climate, I’ve learned they neglected to tell me a few things, and that could be one of them.

      I’m a little fed up with trying to figure things out on my own. I think I’ll go to a camping RV store and ask them to show me some things.

       Everyone’s advice has been helpful.  

      • Hathalm's avatar
        Hathalm
        Explorer III

        ELECTRIC HOT WATER HEATER SOLVED!!!

         My electric hot water heater never worked in my 5th wheel.

        i coordinated with y’all great guys here, got ideas for winterizing, maybe it’s bypassed, burnt out, broken wire…

        I worked with the service manager at the dealership…

        then I went to an rv place, who couldn’t help me, but they referred me to a man who comes out to the RV Park, mobile repair tech.

         He was very knowledgeable, began testing…. The element was NOT burnt out, but there was no electricity to it. He checked the control panel, the breaker box… electricity should be there.

         He opened the wall cabinet in the head and began searching—AND THERE WAS THE PROBLEM:   

        the electric water heater was not plugged in.

        Ugh!!!    It was inside the wall. I’d have never found it

        Here plugged it in.

         

         It works.  

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