Water pump in our Winnebago Vista cycles on and off rapidly making a chattering noise. Dealer replaced the pump and still have same problem. Adjusted pressure on pump and still have the same problem. Occasionally, pump will work normally for a few seconds then revert to rapid cycling. Any ideas on what the cause is?Thanks to all who share their knowledge.

The pressure switch that causes the pump to run is located in the pump itself. Since the pump was changed, that means the pressure switch was changed also. Nothing left to be the problem. Strange. Maybe there is a leak in the water system. Could be anywhere including shower and sink faucets, or maybe the commode.

A leak somewhere..... There is a check valve in the pump that should prevent pressure from leaking back to the tank. You replaced the pump so it's very unlikely you had 2 with the same problem. The pressure must be leaking down somewhere in the coach. Ice maker line? Washing machine?

It sounds like the pump is sucking air on the intake side. Look for a leaking valve/pipe where you fill the water tank.

Does it do this when you are running water or when every thing is shut off ?

It's either sucking air upstream of the pump or a clogged/pinched line downstream of the pump.As asked above, does it do this when you are running water or when every thing is shut off ?

Fresh water pump issues | Good Sam Community

doxiemom11
Explorer II
Apr 27, 2018
Ours does that when we fail to change the setting from "city" to "tank" setting when using the pump.
two_travelers
Explorer
Apr 27, 2018
Rapid on/off happens only when water is running.Thanks for the replies.
2112
Explorer II
Apr 26, 2018
It's either sucking air upstream of the pump or a clogged/pinched line downstream of the pump.

As asked above, does it do this when you are running water or when every thing is shut off ?
K_Charles
Explorer
Apr 26, 2018
Does it do this when you are running water or when every thing is shut off ?
rgatijnet1
Explorer III
Apr 26, 2018
It sounds like the pump is sucking air on the intake side. Look for a leaking valve/pipe where you fill the water tank.
garyemunson
Explorer II
Apr 26, 2018
A leak somewhere..... There is a check valve in the pump that should prevent pressure from leaking back to the tank. You replaced the pump so it's very unlikely you had 2 with the same problem. The pressure must be leaking down somewhere in the coach. Ice maker line? Washing machine?
larry_cad
Explorer II
Apr 25, 2018
The pressure switch that causes the pump to run is located in the pump itself. Since the pump was changed, that means the pressure switch was changed also. Nothing left to be the problem. Strange. Maybe there is a leak in the water system. Could be anywhere including shower and sink faucets, or maybe the commode.

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