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Old 09-23-2014, 11:19 AM   #1
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Water Pump Won't Shut Off

What are we missing here? We've turned all the faucets on (kitchen, bathroom, shower, outdoor shower) then turned the pump on, ran the water for a few minutes, turned all faucets off and the pump still keeps running. We can turn it off manually, but wonder why the auto shut off doesn't work. Don't see any leaks (this is a new 2014 400BH). I feel like we are missing something simple. Thoughts?
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Old 09-23-2014, 11:32 AM   #2
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Is it still filling the hot water tank? If so, it could run for a little while before it's up to enough pressure to shut off.
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Old 09-23-2014, 11:37 AM   #3
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We've let it run a while and it doesn't shut off. We have a tankless water heater.
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Old 09-23-2014, 11:39 AM   #4
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Well, in that case, if it's not still filling, and it's not leaking from somewhere then the only thing left is a possibly bad pump. Since it's a new unit, I'd just bring it back to the dealer and let them deal with it under warranty.
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Old 09-23-2014, 11:46 AM   #5
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Eliminate outside (city water connection) leak and outside shower wand open as possible pressure loss source.

When you open the faucets; do you have pressure inside?

Yes; Pressure detection switch stuck closed or bad internal check valve allowing pressure to return water to tank.
Call for warranty replacement.

No; Failure to prime:

Low water level in fresh tank - Causes: Not enough water in tank and pump inlet sucking air. (see photo)

Loose connection on inlet side of pump allowing air to intrude causing failure to prime.
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Old 09-23-2014, 11:50 AM   #6
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Quote:
Originally Posted by Herk7769 View Post
Eliminate outside (city water connection) leak and outside shower wand open as possible pressure loss source.

When you open the faucets; do you have pressure inside?

Yes; Pressure detection switch stuck closed or bad internal check valve allowing pressure to return water to tank.
Call for warranty replacement.

No; Failure to prime:

Low water level in fresh tank - Causes: Not enough water in tank and pump inlet sucking air. (see photo)

Loose connection on inlet side of pump allowing air to intrude causing failure to prime.
We've turned the outside shower off, we have pressure in the faucets, the water tank is more than half full. I'm thinking the pump went bad. We're heading back to the dealer in November so this might just go on the list.
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Old 09-23-2014, 12:00 PM   #7
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Trash in water line sucked into the pump can cause the check valve to stay open and results in short cycling or continuous running.

Try opening all the faucets (to create a large demand) then turn on the pump. Let it run a bit then turn off the pump.

Close the faucets and re-power the pump.
Maybe it will clear.
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Old 09-23-2014, 12:16 PM   #8
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Make sure the cap on the fresh water tank is closed and sealed correctly. There have been a few times I have filled the fresh tank and failed to put the cap on (brain fart) It wont pressurize unless ti is a closed system.
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Old 09-23-2014, 12:58 PM   #9
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Make sure the cap on the fresh water tank is closed and sealed correctly. There have been a few times I have filled the fresh tank and failed to put the cap on (brain fart) It wont pressurize unless ti is a closed system.
FYI - the fresh water tank needs to be vented to avoid collapsing the tank.
There is a vent right next to the fill port.

The cap just keeps junk out of the tank.
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Old 09-23-2014, 01:46 PM   #10
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Make sure the cap on the fresh water tank is closed and sealed correctly. There have been a few times I have filled the fresh tank and failed to put the cap on (brain fart) It wont pressurize unless ti is a closed system.
I'm trying to figure out how this would matter, isn't there a vent next to the fill cap anyway?
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Old 09-23-2014, 04:01 PM   #11
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As the original post stated, this is for a Forest River Berkshire which does not have a hot water tank, and does not have a fresh water gravity fill. If your fresh water tank has water above the pump suction line, then you should have enough water to operate the pump properly. Ensure all of the lines are purged of air by running all faucets to include the washer lines and ice maker lines also. if you have good water pressure at all faucets then the air should be out of the lines. At this point if the pump is still running, the pump itself is bad or you have a water leak. Sometimes you may have a leak that does not show outside the coach. Ensure all of the basement compartments are not wet. I had a leak at my city input behind the water manifold wall and took a day to notice it. When I saw water dripping out of the awning side wet bay (where the fresh water tank and pump is) I lifted the door and had a huge puddle there. sometimes you may have a small leak enough to keep the pump running but wont see a visible leak unless you follow all the lines. If still no leak, I would try and remove power completely from the pump, fuse, wires etc and see if it will reset itself. Hope this helps.

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Old 09-23-2014, 07:04 PM   #12
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I would agree with previous post. Most likely an air leak
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Old 09-23-2014, 07:05 PM   #13
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Check connections around water pump. I once used Teflon tape in the same.situation
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Old 09-23-2014, 07:14 PM   #14
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Well the trailer I just traded had a pressure switch on the pump to turn it on and off. Have not picked up my Windjammer yet, but I would guess it will be the same. Pressure switch can and do go bad and that can include sticking closed. I would check the pressure switch. Should be mounted on the discharge side of the pump.
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Old 09-24-2014, 12:21 AM   #15
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On my '11 390RB there is an adjustment on the pump itself (a screw that can be turned) that adjusts the pressure at which the pump starts and stops.

I believe that it could maybe be mal-adjusted enough to cause what you are describing. Just thought....

Boowho??
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Old 09-24-2014, 05:17 AM   #16
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Originally Posted by boowho View Post
On my '11 390RB there is an adjustment on the pump itself (a screw that can be turned) that adjusts the pressure at which the pump starts and stops.

I believe that it could maybe be mal-adjusted enough to cause what you are describing. Just thought....

Boowho??
That "screw" would be the pressure switch.
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Old 09-24-2014, 01:50 PM   #17
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That "screw" would be the pressure switch.
Umm..... Yes, I know that; but just thought it may be out of adjustment??

I know if I set mine all the way in one direction, the pump never comes on, but if all the way the other way, the pump never shuts off.

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Old 09-24-2014, 01:58 PM   #18
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Umm..... Yes, I know that; but just thought it may be out of adjustment??

Boowho??
That was for the OP!!
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Old 09-24-2014, 10:54 PM   #19
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That was for the OP!!
OH!
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