Need help with water pump!

Just got back from our first camping trip of the year a 8 night trip and had trouble with the water pump the entire time.
What is happening is the pump is cycling on without anyone demanding water. It cycled on at all times of the day and night, sometimes every 20 minutes and sometimes not for a few hours. It only cycled for a spit second and then stopped. I looked everywhere for a leak and I couldn't find one. We have a 28RKBS. There is a couple water lines in the storage compartment that go under the floor that I have not checked yet but I'm guessing that there is no leak.
Is there anyway a water pump would act like this without a leak?

Thanks

I had this happen a couple of years ago. I to had no water leak but had a couple of fittings that were not tight enough and i think they were allowing air into the system. After i tightened them i had no further trouble.

jacandjan wrote:I had this happen a couple of years ago. I to had no water leak but had a couple of fittings that were not tight enough and i think they were allowing air into the system. After i tightened them i had no further trouble.

Thanks! I'll check the fittings. I'm assuming there hand tighten only?

If you have a outside shower make sure it's turned off. Jim prior Wild Cat 29RLBS Owner

I had this happen to me. Look very close and tighten all connections before the water pump, in particular the ones that have the small screen filter right at the pump. I had to put teflon tape on those ones. What is probably happening is that one of those fittings is just not quite tight enough so it is sucking IN air and loosing the prime. So the pump cycles for a second to get the pressure back. Because the sucking in of air is the problem, there is no drips of water to tell you where the problem is. Very frustrating to find, but just tighten everything before the pump and you should get it.

There is a pressure switch that turns the pump on and off. Either it is loosing pressure somewhere ( Leak ) or maybe the switch is bad. I do not know where the switch is. Maybe built in the pump assembly.

I deal with shurflo pumps almost every day (Roof Cleaning Business) there could be a couple of things wrong

Shurflo pumps are diaphragm pumps if a diaphragm has a small hole in it or is not seating correctly, it will also lose pressure and cause a cycle problem usually this is to build up the pressure that leaks down from the discharge side of the pump.

Make sure you really check for leaks on the discharge side of the pump. I move a suction tube on our pumps to change solutions all the time, if the pump is holding pressure on the discharge side our pumps do not cycle even when the suction side is opened.

The pressure switch is located on the front of the pump and is usually set at 45 psi for RV's. Usually this switch only needs adjusted if it quick cycles during use.

Hope this helps Good Luck

maxum1989 wrote:I had this happen to me. Look very close and tighten all connections before the water pump, in particular the ones that have the small screen filter right at the pump. I had to put teflon tape on those ones. What is probably happening is that one of those fittings is just not quite tight enough so it is sucking IN air and loosing the prime. So the pump cycles for a second to get the pressure back. Because the sucking in of air is the problem, there is no drips of water to tell you where the problem is. Very frustrating to find, but just tighten everything before the pump and you should get it.

I took your advise and put teflon tape on the fittings before the pump. They all seemed pretty tight but the one that connects to the pump did not have any tape on the threads. Were home now so were not in the Cat for long periods of time now but I did go in there and read a magazine for an hour and did not hear the pump run. I'm pretty sure that the teflon tape fixed the cycling problem by not letting air in.
I'll report back if the problem is not solved.


Thanks everyone for there responses and I'll keep all of the advise for future needs.

Thanks again!