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Old 09-20-2011, 11:32 AM   #1
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Fresh water pump/shower issues.

The water for my shower alternates from hot to cold when I use the fresh water pump on my 2011 Cherokee Grey Wolf 28BH. I did install a new fancy (Oxy..Gen...?) shower head/hose I got from Camping World. Any clues as to the cause of this?

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Old 09-20-2011, 02:17 PM   #2
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usually it's bypass valve issue or an outside shower issue.

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Old 09-20-2011, 02:41 PM   #3
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I have no outside shower or faucets...thanks!
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Old 09-20-2011, 02:45 PM   #4
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When is the last time it worked correctly? Check the bypass on the water heater. Make sure it is off. If it is, put the old shower head back on and try that, or remove the shower head and use just the hose. Process of elimination.
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Old 09-20-2011, 02:48 PM   #5
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I vote for by pass on hw heater
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Old 09-20-2011, 03:20 PM   #6
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You will need to install a hot and a cold water check valve that will only allow hot and cold water to flow out, and not backward. This happens usually when the shower shut-off valve is closed to save on water, but the temp valves are still set to where you had them at the start of the shower. When the shutoff is closed, cold water pressure is allowed to back up into the shower pipes; hence the cold water surprize! Install the one-way check valves as close to the rear of the shower control valves as possible, and your problems will be solved! Randy
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Old 09-21-2011, 06:32 AM   #7
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I am leaning to the hot water valve in the shower faucet. There may be bits of anode or scale from the hot water heater in the hot water valve that blocks the flow of hot water intermittently.

I would try removing the hot water valve body and flushing out the line.
Just guessing, but an easy check.

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Old 09-21-2011, 09:10 AM   #8
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Thank you all for the responses. The hot/cold water alternation appears to be related to the pump cycling. The water alternates as the pump runs and stops while trying to maintain pressure during showering. I'm not sure which one cycles the hot to cold or cold to hot (pump running or stopping). Anyway the Greywolf is at my hunting camp, so I'll try your suggestions when I can get back up that way.

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