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12-17-2024, 09:19 PM
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#1
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Junior Member
Join Date: Jan 2024
Posts: 17
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Aqua Hot 400D low water pressure
I wonder if someone out there in Aqua Hot Land can help me out. Mine has very low water pressure. Low enough that the diesel burner will not kick on to heat up the water. But when the electric element will keep it warm. But my problem is still very low water pressure. I have a great cold water pressure in the RV but when you switch to hot it just trickles out. Any advice at all? Someone mentioned to snake out the coils in the boiler. But Camping World told me something completely different. Does anyone have any experience with this? My model is a 400D
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12-18-2024, 05:28 AM
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#2
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Senior Member
Join Date: Sep 2015
Posts: 1,351
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check the bypass valves.
Never go to camping world
did you check all faucets?
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12-18-2024, 06:43 AM
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#3
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Junior Member
Join Date: Jan 2024
Posts: 17
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Quote:
Originally Posted by ransil
check the bypass valves.
Never go to camping world
did you check all faucets?
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Yes, all faucets and shower. When anyone or all are switched to hot water hardly anything comes out.
I agree with you in regards to camping world. They said the system works fine when in bypass mode. Perhaps the mixing valve needs to be changed out?
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12-18-2024, 07:47 AM
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#4
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Senior Member
Entegra Owners Club
Join Date: Apr 2007
Location: SW FL
Posts: 32,834
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Quote:
Originally Posted by DieselPushy
Yes, all faucets and shower. When anyone or all are switched to hot water hardly anything comes out.
I agree with you in regards to camping world. They said the system works fine when in bypass mode. Perhaps the mixing valve needs to be changed out?
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Mark the current position of the mixing valve. Then turn it back and forth to to free up any corrosion that may be restricting the valve
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12-18-2024, 09:15 AM
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#5
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Member
Commercial Member
Join Date: Jun 2023
Posts: 485
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Quote:
Originally Posted by DieselPushy
I wonder if someone out there in Aqua Hot Land can help me out. Mine has very low water pressure. Low enough that the diesel burner will not kick on to heat up the water. But when the electric element will keep it warm. But my problem is still very low water pressure. I have a great cold water pressure in the RV but when you switch to hot it just trickles out. Any advice at all? Someone mentioned to snake out the coils in the boiler. But Camping World told me something completely different. Does anyone have any experience with this? My model is a 400D
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It could be calcification in the boiler tubes or the mixing valve. Did this happen suddenly or has it been getting progressively worse? I would recommend removing a faucet aerator and check the screen for signs of calcium. Try running faucet w/o aerator, is flow better? If found, time to have the system decalcified.
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12-18-2024, 06:47 PM
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#6
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Senior Member
Winnebago Owners Club Fleetwood Owners Club Holiday Rambler Owners Club
Join Date: Dec 2011
Location: North East Florida
Posts: 2,155
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My money is on a bad mixing valve. All your hot water comes through the valve.
__________________
2019 Horizon 42Q
Cummins L-9 450 HP
Maxum Chassis / IFS with Tag
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12-20-2024, 04:49 AM
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#7
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Senior Member
Entegra Owners Club Spartan Chassis
Join Date: Oct 2017
Posts: 2,295
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I would bet on the mixing valve. I guess you could have a boiler tub issue as well.
If all your faucets are running slow but working properly on cold I would not suspect the faucets.
__________________
 Hal and Pam
2022 Entegra Cornerstone W
2020 Ford Edge ST
Sold 2017 Entegra Cornerstone B
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12-20-2024, 10:34 AM
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#8
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Senior Member
Entegra Owners Club
Join Date: Oct 2010
Location: East Greenwich, RI
Posts: 2,525
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Agree mixing valve. I've had a similar issue and exercising the valve fixed the problem. Easy enuf to try and see if that helps. It's on the backside of the AH.
Photo from a pre-2016 classic: https://photos.app.goo.gl/88N3irDWotkytmHE6
Depending which year/floorplan, you may need to remove a partition in the basement to get to it.
Mark the current position and rotate the valve to it's max in both directions a few times. Maybe even with a water faucet turned on to help flush out any debris.
If that doesn't work you may need to descale your plumbing. One DIY option: [ https://www.jcwhitlam.com/Product/1/114/102#
Use of a water softener would help minimize future scale buildup.
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12-20-2024, 11:30 AM
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#9
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Senior Member
Entegra Owners Club
Join Date: Jun 2004
Location: Bayfield, Ontario
Posts: 5,600
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I exercise the mixing valve once a year to help prevent problems with it.
__________________
Don & Gerri
2014 Entegra Anthem 44B
2014 Honda CRV Touring
1300W Solar, 1200AH LiFePO4 FMCA F443497
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12-22-2024, 09:57 PM
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#10
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Senior Member
Join Date: May 2021
Posts: 654
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Exercise that valve monthly.
__________________
2015 Anthem DeQ...
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01-02-2025, 06:11 PM
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#11
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Junior Member
Join Date: Jan 2024
Posts: 17
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Quote:
Originally Posted by voltdoc
Agree mixing valve. I've had a similar issue and exercising the valve fixed the problem. Easy enuf to try and see if that helps. It's on the backside of the AH.
Photo from a pre-2016 classic: https://photos.app.goo.gl/88N3irDWotkytmHE6
Depending which year/floorplan, you may need to remove a partition in the basement to get to it.
Mark the current position and rotate the valve to it's max in both directions a few times. Maybe even with a water faucet turned on to help flush out any debris.
If that doesn't work you may need to descale your plumbing. One DIY option: [ https://www.jcwhitlam.com/Product/1/114/102#
Use of a water softener would help minimize future scale buildup.
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I replaced the mixing valve today. That did not help. Water pressure is still extremely low when faucet or shower is turned to all the way hot. On cold, everything thing flows great. We've always had a water softener on the system. This is driving me nuts. The diesel burner comes on fine and does it's thing. Now, the water isn't that hot. I even have the new mixing valve turned all the way to open at the 145 degree mark.
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01-02-2025, 06:21 PM
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#12
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Senior Member
Entegra Owners Club
Join Date: Apr 2007
Location: SW FL
Posts: 32,834
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Quote:
Originally Posted by DieselPushy
I replaced the mixing valve today. That did not help. Water pressure is still extremely low when faucet or shower is turned to all the way hot. On cold, everything thing flows great. We've always had a water softener on the system. This is driving me nuts. The diesel burner comes on fine and does it's thing. Now, the water isn't that hot. I even have the new mixing valve turned all the way to open at the 145 degree mark.
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Are the hot water by-pass valves on top of the Aqua Hot open all the way?
__________________
Chuck in SW FL
Digital 2021 Cornerstone "B"
A "Digital" 2019 Cornerstone "B" Traded
A "Classic" 2014 Anthem 42 RBQ---Sold
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01-02-2025, 07:31 PM
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#13
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Junior Member
Join Date: Jan 2024
Posts: 17
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Quote:
Originally Posted by brobox
Are the hot water by-pass valves on top of the Aqua Hot open all the way?
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I assume you are talking about these two valves circled in blue? They are open all the way. There is another valve circled in green. That is closed and I assume it's some sort of cross-over valve.
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01-02-2025, 07:44 PM
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#14
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Senior Member
Entegra Owners Club Spartan Chassis
Join Date: Oct 2017
Posts: 2,295
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Did the hot water flow slowly get worse or just go from normal to super slow nearly instantly?
__________________
 Hal and Pam
2022 Entegra Cornerstone W
2020 Ford Edge ST
Sold 2017 Entegra Cornerstone B
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