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Old 12-31-2010, 01:52 PM   #1
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Hot Water Problems

I am having a problem with my hot water supply.
I have very good water flow, in all areas of my rv. I also have hot water in the front sink, and the middle bathroom, but I have trouble getting consistently hot water in the shower and rear sink.
This is very troubling especially since sometimes this problem doesn't exist.
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Old 12-31-2010, 02:30 PM   #2
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Hi KoolBell,
Welcome to iRV2. Can you provide us with additional information about your RV?

1. Coach brand, model and year
2. How is hot water provided?
2a. Hot water heater (tank).
2b. Hydro Hot
2c. Aqua Hot
2d. other?

If you have a water heater, what is the brand (ex. Suburban, Atwood)?
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Old 12-31-2010, 04:07 PM   #3
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First thing that comes to mind is the outside shower faucets are open with the shower head closed.
BOB
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Old 01-01-2011, 10:53 AM   #4
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Ok guys,
First it seems that I have solved the problem for now.
Atwood 10 gallon gas & electric
No outside shower.
I dumped the Low water drain on the hot side for two minutes, then let the water heater catch up, and now have hot water. The drain is toward the rear of the unit, may have had air? Don't really know because of a lack of burping effect when drained.
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Old 01-01-2011, 11:18 AM   #5
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Hi KoolBell,
Thanks for letting us know the solution. The cheap and easy fixes do not come along very often. It does sound like trapped air was not letting the hot water through. Doesn't make sense, but it is the results that count.
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Old 01-01-2011, 11:23 AM   #6
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My coach is a Fleetwood Bounder 2008 year model, with an Atwood 10 gallon tank model that can be either run on gas or electric.
I hope this answers your questions.
This is not the first time this happened, and I am afraid this will happen again. Any suggestions would be greatly appreciated/
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Old 01-01-2011, 08:37 PM   #7
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There is supposed to be air in the water heater tank, typically from the level of the PT relief valve to the top. Lack of a "air head" in the tank could even be your problem. The following is from the Atwood manual:

TO REPLACE THE AIR GAP FOLLOW THESE STEPS:
STEP 1: Turn off water heater.

STEP 2: Turn off incoming water supply.

STEP 3 Open a hot water faucet in coach.

STEP 4: Pull handle of pressure-temperature relief valve (FIG 3-G) straight out and allow water to flow until it stops.

STEP 5: Allow pressure-temperature relief valve to snap shut; close hot water faucet; turn on water supply.

Caution: watch out for hot water when you open the PT valve. Best to wait til it cools or for most of the water to run out of the open tap first.
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Old 01-01-2011, 11:26 PM   #8
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i had this problem on my Winnebago and found out that the check valves (2) on the water heater was bad and not working properly.
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Old 01-02-2011, 10:22 AM   #9
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If he had a bad check valve, it would affect all the hot water taps, not just the rearmost ones.
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Old 01-02-2011, 10:26 AM   #10
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Quote:
No outside shower.
I'm pretty sure your Bounder has a water faucet with a mixing valve in the utility (water) bay. It's probably more like a sink sprayer than a shower head, but the principle is the same. If you have the hot and cold valves open there and the water shut off at the spray head only, the hot and cold will mix through the faucet and very likely will cool off the water in the hot lines elsewhere in the coach. It may affect only some of the hot taps or all of them, depending on how the plumbing is laid out. Make sure the hot & cold faucets in the utility bay are turned off when not in use.
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Old 01-02-2011, 10:52 AM   #11
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Quote:
Originally Posted by Gary RVRoamer View Post
If he had a bad check valve, it would affect all the hot water taps, not just the rearmost ones.
Gary, I just experienced a defective water heater check valve while I was in Louisville. I was already to jump in the shower when I turned the valve on and I got no flow except from the cold water side. I wrote about that in My Blog.

A Mobile RV Tech came by and replaced the check valve (upper) and we were good to go after that!
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Old 01-03-2011, 08:35 AM   #12
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Quote:
Originally Posted by Gary RVRoamer View Post
I'm pretty sure your Bounder has a water faucet with a mixing valve in the utility (water) bay. It's probably more like a sink sprayer than a shower head, but the principle is the same. If you have the hot and cold valves open there and the water shut off at the spray head only, the hot and cold will mix through the faucet and very likely will cool off the water in the hot lines elsewhere in the coach. It may affect only some of the hot taps or all of them, depending on how the plumbing is laid out. Make sure the hot & cold faucets in the utility bay are turned off when not in use.
I feel so inadequate. Normally I would have not left the faucets on, although this time it seems that in my hurry last time time to leave a site, i left that water mixing valve open in the under storage.
Your tip has saved my trip, we were ready to go back and see a tech.
Thanks so much.
Klell Lawrence
Enterprise, AL
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