Water Pump Keeps On Running

[dickcarl]

Finally got around to troubleshooting my "non-functioning" 12 v water pump in the '89 Itasca Sunflyer.  Thought it through a bit, and tried adding bunches of water to the tank.  Suddenly, pump was working. Hurray!  Pressure switch finally broke through, I guess.  But then it ran and ran and ran.  Closed all the faucets, and it ran and ran.  No water coming out from under the rig.

Other trailers and coaches we've owned the pump stopped once it built up pressure, then stopped until you drew down.  Is there some kind of pressure switch that might need adjusting/replacing?

[Rickf1985]

Is it building any real pressure? It may be shot and not building enough pressure for the sensor to shut it down. Also check for a bypass on the hot water heater that may be open. Is this a pressure fill tank system with no gravity fill port? If it is then the fill valve has to be in the closed position or otherwise the pump will just recirculate water back to the tank.

[dickcarl]

Pumps the water out of faucets with spirit.  Just replaced the HWH with electric.  No bypass. It's a gravity fill tank (lives up above the passenger side rear wheel well, fill door about 4' off the ground.

I have no idea about how it divides pressured water from the faucet and water from the pump.  My other MH had an elaborate fill system with valves and diverters.

[Rickf1985]

With gravity fill there is nothing elaborate, water falls into tank, that is it. A one way valve before the pump keeps street water pressure from going through the pump and tank circuit. I would be checking around for a BIG leak. Especially around the water heater since it was just replaced. Or it could just be the pump pressure switch is bad. If you can get to the pump give it a couple raps with a screwdriver handle while it is running with no faucets open and see if it will stop. If you are sure there is no water running and you have real good pressure then it is the switch. I don't know if they are serviceable but as it stands the pump is no good to you so you have nothing to lose by taking it apart and putting it back together. If it still does not work, Oh well, you have not lost anything but some time and you still need a pump. If it now works, hey, you fixed it.

[dickcarl]

We'll see.  The pump is WAAAAAY under, behind the fridge opening.  Might have to take a chainsaw to the outside wall to get at it.

[Elandan2]

OH NO!!    Use a sawzall, you'll get a much smoother cut!!

[EldoradoBill]

What model coach do you have? Pumps are generally accessible to make winterizing less painful. Maybe there's an easier way?


Bill

[dickcarl]

Oh, I can SEE the pump.  Directly under the fridge space, on the floor.  But my tiny little dwarf arms are too short to reach.