Water pump intermittently coming on

Hello "wander round"

We have always carried a spare pump for use when an affected pump needs to be sent for service.
Your problem could be one of the sealing surfaces within a pump, is allowing the pressure to slowly bleed back to the suction side within the pump.
I suggest that you turn one of the isolation switches near the pumps off and wait for the experienced cycling time of the leaking pump to expire, to identify which pump is having the problem.
It is possible even for a miniscule piece of plastic from the within the plumbing to get through the pump strainer and prevent the seal surface within the pump from being effective.
Hope this helps you fault find.
John
aka uncle dodgy.

Yowah would be a tad cool these mornings.

Suggestion: - depends how handy you are, or who else more qualified is around to help you.

If the faulty pump is on the critical supply line, and it must be fixed sooner rather than later, I suggest as a temporary solution, that you remove the faulty pump and replace it with the non-malfunctioning pump and live with only one form of pumped water, usually the shower water and sink supply, until you can get the errant pump overhauled or replaced. You would need then to turn off the isolation switch for the removed pump (usually located near to the pump). The two pumps should be identical and would allow this to be done as an urgent stop gap measure. At least they are identical in our 2000 born 19 footer. I have obviously assumed here that it is the shower supply pump that is at fault, if otherwise then simply turn off the isolation switch for the errant pump and carry drinking water with you as a temporary measure, and get the errant pump fixed/replaced at your leasure.
Bushtracker industries have always been very efficient in the delivery of any urgent replacement bits in the past. Check out what they can do for you, give them a call. A solution utilizing this philosophy, would provide you with a more rapid solution. (I.E. replace the errant pump with the new pump from BTI, and then have the crook one repaired. You would always then have a spare)
I have used Glynd Pumps in the past and found them very good. If memory serves me correctly they are on Bribie Island Qld.
Let me know what you decided and how you get on.

Regards
John

Pleased the problem has been resolved.
Cheers
John

It sounds like your water pump issue could be related to a few potential causes:

Pressure Switch: The pressure switch might be malfunctioning, causing the pump to cycle on and off intermittently. Try checking or adjusting the pressure settings.

Air in the System: Air trapped in the pipes can cause fluctuating water pressure. You may need to bleed the system to remove any trapped air.

Pressure Tank: If your system has a pressure tank, check that it's holding pressure properly. A faulty or waterlogged pressure tank can lead to inconsistent pump performance.

Pump Wear or Clog: There could be a clog in the system or the pump might be wearing out. It may need a closer inspection or servicing.

If none of these help, it might be a good idea to consult with a plumber or water system technician to diagnose the issue more thoroughly.