Pump wont stop running (Stuart Turner Monsoon negative 2.0)

gezgblack70

I have a similar problem and was wondering if anyone here has any suggestions. The pump keeps working although all taps are off, no running water anywhere in the apartment. However when the pump is running and i turn on the hot water tap, hot water comes out for about 2 seconds and turn to cold again (although i haven't turned the heating on for the water to get hot). When I shut the pump off for about 7 hours and turn it back on, it fine( the pump isnt running unless there water running in the apartment) but this only lasts for about an hour. After an hour the pump kicks back on and starts going hard although all taps are closed.

K.Flyer

gezgblack70 wrote: »

I have a similar problem and was wondering if anyone here has any suggestions. The pump keeps working although all taps are off, no running water anywhere in the apartment. However when the pump is running and i turn on the hot water tap, hot water comes out for about 2 seconds and turn to cold again (although i haven't turned the heating on for the water to get hot). When I shut the pump off for about 7 hours and turn it back on, it fine( the pump isnt running unless there water running in the apartment) but this only lasts for about an hour. After an hour the pump kicks back on and starts going hard although all taps are closed.

First off, don't ever leave a pump constantly running if there no water being used, this can cause the pump heads to overheat which can damage the seals and cause leaks.
The constant running heats the trapped water, hence the short burst of hot water.

The are many things that can cause the pump to run incessantly. Busted PCB (see earlier posts on this thread), faulty pressure switch, stuck flow sensors. Pressure vessels can cause problems, or you may have a drip / leak that you have not detected yet. It could even be a leak on the pump that you haven't spotted.

gezgblack70

Thanks for your quick reply. I called the landlord about it and he asked me to take out the fuse which is located in the boiler room with the pump. I took the fuse out and put it back in. The pump has stopped constantly running now. However I have a quick question about the pump if you don't mind.

I have been living in this apartment for a while now and ever since I've moved in here, the pump come on and off every 5-6 minutes, it comes on for about 5 seconds in every 5 minutes. All taps are closed(that is all that i am aware of). Could this be some problem or is this normal. Also my boiler itself also makes some crazy noises sometimes, the only thing I can compare the noise to is a ship creaking as it sinks like titanic -_- sorry, am not trying to be funny.
Anyways this crazy noise occurs and when I open a tap it slowly goes away.

K.Flyer

gezgblack70 wrote: »

[...]

I have been living in this apartment for a while now and ever since I've moved in here, the pump come on and off every 5-6 minutes, it comes on for about 5 seconds in every 5 minutes. All taps are closed(that is all that i am aware of). Could this be some problem or is this normal. Also my boiler itself also makes some crazy noises sometimes, the only thing I can compare the noise to is a ship creaking as it sinks like titanic -_- sorry, am not trying to be funny.
Anyways this crazy noise occurs and when I open a tap it slowly goes away.

No, the pump should not come on every few minutes, it should only operate when you are using water. By a process of elimination you would find that you most likely have a drip on the ball-cock in a toilet cistern (most common), a faulty non-return valve (next most common), or an issue with the pressure vessel, a leak on a pipe, or a leak on the pump.
The noise you refer to, sounds like you could have a water hammer problem, is it the cold kitchen tap that stops the noise?

grigore turcan

We have monsoon N2.0 bar twin pump in our apartment. It is continuously on / off. For example: after using the tap the pressure in the pump is going up to 1.7 bar and stays there for a few seconds. Then the pressure slowly go down to the 0 mark and the pump starts working for 3-4 seconds until the pressure is up 1.7 mark. The the cycle repeats. The pipes and the toilets are not leaking, we checked them.
Can anybody tell us what can course this happen?
Thank you!

K.Flyer

If leaks have been absolutely eliminated as being the cause, then most likely it is the non-return valves in the pump.

grigore turcan

Many thanks for the prompt reply, K. Flyer. Are you an electric engineer? Can the problem with non-return valve be fixed by myself or do I have to call a specialist to come and fix it? In Ireland to call an electric engineer costs 120 euro, so i would like to fix it myself. thanks.

K.Flyer

It is something that you can do for yourself if you want to, but if not done right your home could get very wet very quickly.
There are no electrical components involved, but you do need someone who is competent and experienced in pump repairs.

Zynks

K.Flyer wrote: »

A number of things can cause your pump to stay running.
What is important right now is to not allow it to stay running, plug it out or remove the fuse.
If the pump is running with no water passing through it for a long period of time you will do damage to the seals which becomes a more serious problem.

Check you have no leaks by shutting off the valves on the outlet side of the pumps (the outlets are where the pipes are connected to the higher sections of the pump heads).
If the pump is still running it is more than likely the relay on the pcb is gone and the pcb needs replacing, or the low pressure switch may be faulty and would have to be replaced.
A faulty capacitor would prevent it from starting.
And lack of air in the vessel would not cause it to keep running either.
The non return valves can cause similar problems but they are usually associated to very regular on / off patterns.
My money is on the pcb from what you describe.

This post just saved me from a meltdown after weeks of frustration trying to stop my pump from working intermittently. I know the post is six years old, but if K.Flyer is still around, THANK YOU!