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My atwood r.v. water heater , part number ge-9 ext , will heat up but only luke warm water will come out of it when we turn on the tap , what could the problem be ?
Check two things, 1- check that the hot water heater bypass valve is completely closed so that it is not bypassing at all and mixing cold water . 2- check your outside shower valves, make sure both of those are turned off...if they are turned on but the valve on the head is turned off...this will also allow cold water to mix in the hot water line. If those check out ok...then the mixing valve is likely clogged, you could take it off and try soaking it in boiling white vinegar, or try to adjust it, there is an adjustment screw under the black cap, I think its an allen screw...but they fill the center with glue so you can't adjust it...you have to dig that glue out so you can get the allen wrench in...may even be a torx screw...either way it can be adjusted, you just have to dig the glue out first.
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Water heater is heating water but only luke warm water arrives at faucet. Open TP valve and confirm that hot water is available. If water at TP valve is hot, then problem might be plumbing-related, for example crossover. http://waterheatertimer.org/Crossover.html
There should be a temperature setting on the gas valve. It should be on top or front and have several settings normally vacation, warm and hot. Rotate dial towards hot setting to increase water temperature. Hope this helps. Thanks
Run it on propane and let water heater go through a heating cycle, and when it shuts off, CAREFULLY , pull the lever on the pressure relief valve slightly and see how hot the water feels there. If it's hot there, then it's more than likely a problem with your by-pass valve(s) at the back of the water heater. Either in the wrong position, or faulty, and allowing hot and cold to mix. If in doubt which one it may be, you may be able to remove by-pass set-up completely, depending on what system you have. What the ultimate goal is would be to attach your incoming cold line directly to bottom fitting of water heater, and outgoing hot line, to the top. Not unusual in some systems for one of the shut-offs in between the 2 lines to stay partially open, and allow cold to mix with hot, thus -warm only. If it's not hot at pressure relief valve, then I suspect a faulty thermostat, but that would mean they both (hydro and gas) would have to be faulty which is unlikely.
You have a cracked dip tube. Part at hd is under 10 dollars. Remove and replace via cold water inlet side top of water heater. Degree of labor skill 1-10 = 8.
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