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12-25-2017, 01:34 AM
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#1
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Junior Member
Join Date: Jul 2011
Location: Central Point, or
Posts: 13
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Hot water problems that are stranger than fiction
We have a 1992 38' American Eagle.
When we turn the water heater on it heats just fine, and we have scalding hot water in the Kitchen Sink and in the Bathroom Sink.
With the water on "shore water" only the water in the shower will almost never get hot unless you turn on the pump and have water in the fresh water tank.
This was not always the case, it has just begun needing the pump and fresh water tank to get hot water to the shower, the other issue is that the hot water section of the water valve is only 1/8 of a turn, any more than that results in cold showers.
Is there a schematic available on the plumbing that might reveal where there could be a blockage of the hot water line to the shower.
Thanks for your help
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12-25-2017, 02:18 AM
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#2
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"Formerly Diplomat Don"
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 25,325
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Have you by chance used your outdoor shower recently? Sometimes if it's left on at the handles, but shut off at the shower head, it can cause an issue like this.
__________________
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2024 GMC Sierra 1500 Denali 4x4 6.2L
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12-25-2017, 08:29 AM
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#3
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Senior Member
Join Date: Nov 2017
Location: Citra, Florida
Posts: 1,396
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Quote:
Originally Posted by Dutch Star Don
Have you by chance used your outdoor shower recently? Sometimes if it's left on at the handles, but shut off at the shower head, it can cause an issue like this.
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X2 or possibly a bypass valve.
__________________
Good Luck and keep us posted please. "Q"
1999 Newmar, Mountain Aire 3768, V-10, CAI, Headers.
"Spending our kids inheritance one trip at a time"
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12-29-2017, 11:51 PM
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#4
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Junior Member
Join Date: Jul 2011
Location: Central Point, or
Posts: 13
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outdoor shower
I checked the outdoor shower and it is off at the handles.
I have no idea where a bypass valve would be located.
The interesting issue is this, for the last year, the hot water has worked on shore water, while the pressure is lower on shore water the hot water worked in the shower no matter what. Turning the pump on did increase the water pressure but the hot water was available in the shower either way, over the last couple of months, it has become less and less available in the shower unless the water pump was on and it has become unavailable without the pump on in the shower regardless.
There is still hot water in either sink pump or not but the shower remains the same.
Thanks for the thoughts. What would a bypass valve be bypassing, the water heater?
Thanks,
Steve
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12-30-2017, 12:22 AM
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#5
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Senior Member
Damon Owners Club
Join Date: Feb 2016
Posts: 537
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Try this . There are other videos on this subject.
__________________
2005 Damon Daybreak 3070 Workhorse P32 8.1 eng
Toad - 2006 Chevy HHR Flat Tow
Bluie Ox Tow System and Brakes
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12-30-2017, 12:43 AM
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#6
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Senior Member
Monaco Owners Club Vintage RV Owners Club
Join Date: Sep 2014
Location: anywhere U.S.A, Currently back home in Thailand!
Posts: 4,245
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Sounds like your shower valve is plugged up on the hot side, requiring the added pressure! Do you have separate valves, or the one for both?
I would turn off your water supply, and open a low point drain, to relieve the pressure, and take your valve apart, and see what is blocking the hot flow!
JMHO! Rail!
__________________
Retired, and "Always on Holiday!" 
1996 Monaco Windsor 38PB, "Mona" 275 HP., 8.3 Cummins, 3060 Allison 6 speed, 2001 PT Cruiser, "Bailey"
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12-30-2017, 06:19 AM
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#7
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Senior Member
Workhorse Chassis Owner
Join Date: Sep 2007
Location: st.charles mo.
Posts: 1,482
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If you have a shower valve with one handle the seals inside are leaking.
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