Water Pump Not Working Properly?

74SovereignInt. · 11-10-2002, 02:14 PM

Hello, I have installed a new Shurflo pump and am wondering if something else is not quite proper.

The problem is that it never seems to shut off. I was under the impression that I could leave the pump switched on and that it would activate whenever there was a drop in pressure. This is not the case. After a period of time it bogs down and then blows the fuse. How is someone supposed to use the facilities in the bathroom when the pump can't be turned on?

Thanks for your consideration.

74Argosy24MH · 11-10-2002, 04:12 PM

Bad pressure switch?

John

**john hd** · 11-10-2002, 07:04 PM

is the pressure switch wired into the circuit?

or are the two wires from the motor wired directly to the source supply?

john

74SovereignInt. · 11-10-2002, 08:01 PM

I have no knowledge of a pressure switch. Would this be an integral part of the new Shurflo pump? There are two wires that come to the pump, one seems to be hot, the other a neutral. If the switch is a part of the pump then I can't believe that it would be bad as the pump is new. Any advice on this one?

PeterH-79MH · 11-10-2002, 08:06 PM

I can think of three conditions that would make the pump run all the time:
1. empty fresh water tank
2. open drain valve/water line
3. defective pump

new does not always = good

**Pick** · 11-10-2002, 08:13 PM

Shur-Flow makes many kinds of pumps for different applications. Some DO NOT have pressure switches. Make sure you have an RV type pump with a pressure switch.

**john hd** · 11-10-2002, 08:27 PM

the switch should be on the plastic end cap (other end from the motor)

there should be two automotive type spade lugs.

you want the source wire to run in and out to the motor through these lugs. this will switch the pump on and off as pressure varies.

or you may not have them if you have the wrong pump like pick sez.

john

Gordon Watt · 11-10-2002, 09:18 PM

The pump number should be 2088-443-144.

I have run mine steady filling my black water tank for flushing and there is no heat in the pump at all.

smily · 11-11-2002, 01:44 PM

I know this may seem to obvious but do you have water flow even though the pump is running all of the time?

If you have no water than you have the drain valves open, remember you may have two sets of drain valves, aft and under the galley. If either of these are open, you will have plenty of pump action but no water.

If you you do have water flow while pump is running, you have leak or water pressure is not getting to full pessure. ( leak or pressure switch.

I have been to this school.

Good luck,
Smily