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Old 01-18-2020, 08:40 PM   #1
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Water Pump Runs When Off

Here's one for you. My water pump switches are off but the pump runs when a faucet is opened. Hooked up to City water which is indeed flowing in rv as I can see at spigot and hear when flip to tank fill. Turn pump on and then off but it still keeps going. Stops when water faucet closed just as if I wasn't hooked up.

I've read about and experienced pump running continuously when fill valve isn't closed but this isn't continuous it's with demand. Bad controller maybe? Thought I'd ask about other possibilities before I go under there contorting myself with an ohmmeter.
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Old 01-18-2020, 11:22 PM   #2
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On 99%, There is no controller, as in NO circuit board, but there is a pressure switch, but it is a part of the pump, mounted on the pump, normally; yours maybe exception? However, with switch OFF, the only thing that could explain it is someone miswired the switch, or switch has failed in the ON position?
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Old 01-19-2020, 12:26 AM   #3
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Water Pump Runs When Off

You clearly have power to the pump when you should not. One of your on-off switches is failed. Check that switch line.
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Old 01-19-2020, 03:01 AM   #4
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How many water pump switches do you have???

I have 4 on my 99 signature

Do you have a toggle switch that could have been activated ? On your panel.

Do you have a water bay switch.

One at each sink ?
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Old 01-19-2020, 10:05 AM   #5
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How many water pump switches do you have???

I have 4 on my 99 signature

Do you have a toggle switch that could have been activated ? On your panel.

Do you have a water bay switch.

One at each sink ?
This or you have two wired as a three way switch.
Just like a three way light switch you can turn it off a one point and then on at the other.

It can look like it is off at one point but totally depends on what the other switch is.

I installed a small LED light at each switch so I know if the pump/pressure switch is getting power or not.
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Old 01-19-2020, 06:45 PM   #6
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I've got three switches bath, wet bay and monitor panel. But they all have indicator lights that go on and off as they're supposed to. Pump runs on City water with lights off when faucet is open. I'm thinking I'll just have to crawl in there and verify voltage or lack thereof at the pump.
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Old 01-19-2020, 11:38 PM   #7
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Your water pump may use a relay which is powered by the switches. If the relay is stuck in the closed position, it will always send power to the pump regardless of the switch positions and the pump will run when a faucet is opened.
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Old 01-20-2020, 07:13 AM   #8
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That's what I'm afraid of. I guess the relay is what I called a controller in the OP, and it's no fun at all to get at. Oh well, until I get to it better to run when it doesn't needed to than not when I need it.
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Old 01-20-2020, 11:35 AM   #9
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FWIW, the relay works by grounding one of the terminals. When you depress one of the switches a path to ground is created. Every other push alternates between on and off. If the lights are working normally, and the pump still is powered, there is a problem with the relay or a short to another powered source.
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Old 01-24-2020, 08:30 AM   #10
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Sounds like a bad controller. Get one of the correct amperage for your pump and replace it.
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Old 01-24-2020, 01:25 PM   #11
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The latest is when not connected to City water, pump turns off just fine but switch so it would appear it's not the controller.

Could pressure of City water be causing this somehow?
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Old 01-24-2020, 07:19 PM   #12
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Do you have your fill tank valve ( closed)?
Quote:
Originally Posted by Greg121 View Post
The latest is when not connected to City water, pump turns off just fine but switch so it would appear it's not the controller.

Could pressure of City water be causing this somehow?
The only time you want it OPEN
Is when your filling the tank.

Your 12 volt pump should be OFF
When your filling your tank.
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Old 01-24-2020, 08:03 PM   #13
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Quote:
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The latest is when not connected to City water, pump turns off just fine but switch so it would appear it's not the controller.

Could pressure of City water be causing this somehow?
Letís get this clear, since itís been a while.

When disconnected from city water and the pump switches are OFF, opening a faucet does not cause the pump to run. Is that correct? In other words, you have no water pressure.

Then, if you connect to city water and do not touch the switches, opening a faucet will cause the pump to run. Is that correct?
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Old 01-24-2020, 09:04 PM   #14
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Correct, no City water pump on/off as it's supposed to.

City water with pressure, pump switch off, faucet opened, pump runs.

Tank fill valve closed, or as closed as I can get it. Occasionally I do get a tank fill when I dont want it. And, pump doesn't run continuously asit has when I've forgotten the valve after disconnecting from a fill.
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