Community Forums

RVPioneer · 06-01-2017, 03:04 PM

What would cause the water pump to run continuously when the water control valve is in the "Tank Fill" position, regardless of the position of the faucets? Where is the pump sending the water if the faucets are closed? I don't believe this occurs on my coach. It does seem plausible that a pump trying to force water into a closed system might experience a short life span, or blow a fuse, or melt a small gauge wire.

Did WRV think the tank would fill faster if the pump pumped water from tank A to tank A? Did they have a sense of humor?

I keep the water pump off whenever connected to shore/city water. It's one of those things in the OM that seems like a good idea. Maybe my water control valve is faulty, or special, but it seems to pressurize the water lines in the coach and fill the tank when in the "Tank Fill" position.

RVPioneer · 06-03-2017, 11:27 PM

Regarding post #11 on this thread, which to paraphrase says: if or when the WCV is in the "Tank Fill" position the pump (water pump) will run continuously whether or not a faucet is closed. I ran a test on my coach today both with and without a pressurized hose connected to the city water inlet and with the WCV set on tank fill. At no point did the water pump run in either case. This seems to be the correct function of components. The water pump should only run when two conditions are met:
1-the water pump switch is on
2- a demand for water is present (a faucet is open)

It will run briefly when initially turned on and occasionally to build pressure, typically from pressure loss due to water going to the ice maker. Frequent cycling may indicate a water leak somewhere in the system.

Old Scout · 06-04-2017, 07:38 AM

RVP--agree, the valve has to fail inside for the leak-thru to occur.....

wolfe10 · 06-04-2017, 08:01 AM

Actually, our 2003 FDDS is plumbed as described in post #11.

With the fill valve in fill position water goes from pressure side of the system to the tank. So, with the pump on, it will "recirculate" water.

Plumbing from water fill to tank could be done several ways-- different, not better or worse. Just determine how yours is plumbed.

Old Scout · 06-04-2017, 09:57 AM

Perhaps I "mis-remembered" but am pretty sure the three-way valve for city vs fresh tank switching isolates the tank to city water when selected. So pump shouldn't recirculate back to tank--I don't think?????? My valve failed several years ago [totally cheap design] so I added a dedicated filler connection for the tank and made city water a direct connect to inside plumbing.....

RVPioneer · 06-04-2017, 10:33 AM

Interesting. I've never filled the tank with the water pump switched on. It's always off when an outside water source is connected. Looks like another test is in order. The way I interpreted the wording in #11 was that turning the valve to tank fill would energize the water pump. This did not seem possible without an auxiliary switch for the pump being connected to the WCV or a pressure sensing switch downstream from the valve, which would seem unlikely as the water is going into an open system (tank with overflow vents).

We did discover a leak at the water filter under the kitchen sink while filling the tank, which leads me to believe that, at least on our coach, water pressure is maintained throughout the coach with the WCV on "tank fill" while excess pressure follows the path of least resistance to the tank.

WRV's reputation of changing things without notice make all the above scenarios possible.

Ken T. · 06-05-2017, 08:55 AM

On our 2005, one side of the water fill valve is connected to the house plumbing and the other side is connected directly to the water tank. When the valve is set to "fill tank" the water pressure in the house will drop to zero or, if the water pump is on, it will run continuously.

Jackduncan · 06-05-2017, 10:37 AM

Well here is what I found, the fuse was bad looking at it it looked good but the pins were fulling out. I replaced it and it is working great.

Thanks to all that gave me there great idea's

Jack

DrDaveMA · 06-05-2017, 03:46 PM

Replace the glass cartridge fuse/holder with the newer blade/automotive fuse, it does not suffer from the vibration issues.

Mule Skinner · 06-05-2017, 11:45 PM

Quote:

Originally Posted by wolfe10

Actually, our 2003 FDDS is plumbed as described in post #11.

With the fill valve in fill position water goes from pressure side of the system to the tank. So, with the pump on, it will "recirculate" water.

Plumbing from water fill to tank could be done several ways-- different, not better or worse. Just determine how yours is plumbed.

My 04 dose the same thing. Always has.

Janet and Todd · 06-06-2017, 09:18 AM

On ours, if the pump is on and the Silverleaf decides to turn the "autofill" on, then the pump will run until a human turns off either the pump or the autofill. Even if I set the autofill to start when the tank is at one gallon, sometimes the Silverleaf decides on it's own to start autofilling.