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Old 09-13-2016, 12:11 PM   #1
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Water heater-no not water inside

I went camping last week and the water would get hot but when u turn on the hot in the coach u would get nothing.No where on the coach or outside would u get hot water?When i pulled up on the safety valve on water heater outside hot water would come out.Can any one give me some ideas on this?THanks
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Old 09-13-2016, 12:14 PM   #2
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are your valves set for winterize or normal use... only thing I can think of
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Old 09-13-2016, 12:28 PM   #3
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summer.The only thing i can think of is a kinked line.I have checked for a kink in a lot of places but no luck so far!
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Old 09-13-2016, 12:30 PM   #4
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Are your outside shower faucets turned on ? They need to be off.
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Old 09-13-2016, 12:42 PM   #5
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they are off.I tryed the hot water outside
have cold but no hot!,
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Old 09-13-2016, 12:51 PM   #6
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Could be the inlet or outlet check valve on the unit.
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Old 09-13-2016, 12:56 PM   #7
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Water heater heating water as evidenced by hot water coming out T&P Relief Valve so it is NOT a heating issue.

That leaves a delivery issue

Cold water from hotside of faucets indicates:
Water heater BYPASS Valve is still OPEN so cold water flows into Hot water system (Check valve on hot out closes)

OR

You have an Atwood XT Model water heater that uses a 'MIXING Valve' to control water temp on hot water system
Water heater heats water to 160*F then cold water is mixed with it so water going into hot water system is 130*F
Hot going into Mixing Valve clogs up from scale/crud in water heater and then only COLD water flows thru Mixing Vlave


SO what Brand/Model of water heater?
Providing THAT kind of info when seeking help is beneficial to ALL


This is an Atwood with Mixing Vlave
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Old 09-13-2016, 01:11 PM   #8
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I have a atwood 10 gallon l.p gas or electric.I tryed the outside hot turns on runs for a second not a hole of water comes out but not hot. THanks
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Old 09-13-2016, 01:32 PM   #9
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Quote:
Originally Posted by sewerdog View Post
I have a atwood 10 gallon l.p gas or electric.I tryed the outside hot turns on runs for a second not a hole of water comes out but not hot. THanks

WHICH Atwood 10gal.....that make several ??

IS it like one in picture?

No....

Then BYPASS valve on water heater is OPEN
Only means for COLD water getting into HOT water lines

Showers not being closed at hot/cold handles and only at 'button' on handle will allow cold/hot to mix but that usually means LUKE WARM not COLD

Standard Atwood with cold inlet and bypass (hot out uses check valve)



Which 10gal?
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Old 09-13-2016, 02:20 PM   #10
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Iam not sure of which one i have mine his under the motorhome in a metal box with a plactic hole u can un screw to make a little access.This water heater just started acting this way last week! it was working fine but there has been no values turned but something has broke or something!
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Old 09-13-2016, 05:43 PM   #11
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So i guess old biscuit i need to get to the back of the water heater and make sure those values are right.My water heater dont have warm water at all so i guess it is the one that dont have a mixing value. I guess that check value might be bad! THanks
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Old 09-13-2016, 08:58 PM   #12
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Winnebago uses check valves at the back of the W/H to prevent filling it with antifreeze during winterization. One or both have broken internally. When broken, it will stop the flow of hot water. Replace as needed.
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Old 09-13-2016, 11:49 PM   #13
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Quote:
Originally Posted by sewerdog View Post
So i guess old biscuit i need to get to the back of the water heater and make sure those values are right.My water heater dont have warm water at all so i guess it is the one that dont have a mixing value. I guess that check value might be bad! THanks

OK my goof........
I misread that you had cold water flowing out of hotside at faucets

Now I understand you have NO HOT water flowing

You have water going into water heater and it is being heated as evidenced by hot water out of relief valve.

Hot out from water heater tank has a check valve inside the 'nipple' screwed into tank (see 2nd picture)
Failed check valve would NOT allow any water flow OUT of water heater tank

You will need to replace the check valve assembly
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Old 09-14-2016, 07:57 AM   #14
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ok THanks
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Old 09-14-2016, 08:11 AM   #15
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My thought in post #4 as well
Quote:
Originally Posted by Old-Biscuit View Post

You will need to replace the check valve assembly
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Old 09-14-2016, 12:44 PM   #16
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My thought in post #4 as well
Guess you should have highlighted your thought and got the thread back on target................
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