Galley (water) pump cycles on and off

[danv13]

My water pump started cycling on and off even when there are no faucets open. Short bursts every 5-8 seconds.
When I open the engine hatch I hear the normal pump sound and also hear a sound like air is being released right at the end of the pump cycle. Seems like I might have leak in the system but I can't seem to locate it.
Thanks,
Dan

[sailor]

The pump is to maintain pressure, if it cycles the system
is loosing pressure or the pump pressure switch has an
issue. Turn on the sink forcett and check if the pump is on
or the water flow is adequate (rapid flow) then turn on the
shower etc and check for flow. Pump may have a leak.

[frodo13056]

You didn't mention if you just refilled your freshwater tank - and if you did, did your pump lose prime before you re-filled your tank? If your pump lost prime, then you have air in the system and you need to open all faucets to get the air out of the lines and hot water heater.
 
If that isn't the case then either you have a leak or the pressure regulator check valve on the pump is going bad. To see if you have a leak you can mark your freshwater tank and leave your fresh water system alone for a few hours and see if the level in the freshwater tank drops. If the level drops, you have a leak. If the level does not drop and you are sure that you have bled all the air out of the lines and have solid water coming out of all faucets, the pump pressure regulator check valve is going bad.
You can take the pressure regulator / check valve apart and clean it but if the rubber diaphram is bad, your system will continue to cycle as the regulator check valve will leak backwards into the pump causing a drop in the pressure on the discharge side of the pump and the pump will continue to cycle.
On top of the pump, it has a pressure switch and there is a screw that you can either turn in to increase your water pressure or decrease the water pressure. Sometimes you can back the screw off (drop the system pressure) and see if the pump stops cycling.
You can also get the number off the pump and go online and get a rebuild kit for it.
Here's a link for the Jabsco pumps:
http://www.pumpagents.com/JabscoPumps/31395-0294.html

Good luck

[Rinker342]

If you have a vacuflush head, it may be losing water and the water pump is trying to catch up.  If that is it, try cleaning around the vacuflush ball where it meets the bottom of the bowl.

[themaniam1]

Check your transom shower.  Ours was leaking just a bit because when the handle was in the lever was depressed oh so little but just enough to leak and run down the hose into the engine compartment.

[danv13]

It was the transom shower leaking. Tightened everything up and  all is well with the pump.

Thanks for the help.

[Babyboomer]

It was the transom shower leaking. Tightened everything up and  all is well with the pump.

Thanks for the help.

Mine started doing that a couple years ago had to close the handles real tight and it kept getting worse , you can open that shower box even though it says you can't on the back new shower box over $125. new washers and O rings about a quarter!