Booster pump keeps kicking in for no reason

whats_up

Hey, we have a booster pump in the hot press and recently it came on and stayed on permanently, we had to turn it off and on manually at the wall with the power switch.

That problem kind of solved itself somehow and we can leave the pump switched on at the wall now, but every 60 seconds or so the pump kicks in for a few seconds.

What could be causing this? Thanks!

LIFFY FISHING

Make and model ?, any pics?

whats_up

Hi, it's a monsoon brand pump, no pics but it looks a lot like this https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcQk5VLL6Is307CzNNMTPY0fJOe2H5RgvBOUUwr8ony7iMcnzUAA
It also has an air pressure tank just above the pump hooked up to the two pipes either side of it

3pigs

whats_up wrote: »

Hey, we have a booster pump in the hot press and recently it came on and stayed on permanently, we had to turn it off and on manually at the wall with the power switch.

That problem kind of solved itself somehow and we can leave the pump switched on at the wall now, but every 60 seconds or so the pump kicks in for a few seconds.

What could be causing this? Thanks!

i.d say you have a leak

whats_up

I had a look around and there doesn't seem to be one. Could whatever have caused it to be on constantly before be affecting it now still but less?

Thanks for the replies!

sawdoubters

look for float switch that turns it in

whats_up

The hot water tank seems to be a sealed unit, we are in an apartment so I guess cold is from the main tank in the building

K.Flyer

One of the most common causes of that model pump kicking on for short bursts is a slight drip on a tap, a mixer or the ball cock in a toilet cistern.
If you have valves on the outlets pipes from the pump close them, if the noise stops then you have a slight leak somewhere. If it does not stop then the non-return valves on the pump need changing. Also worth checking is the air pressure in the expansion vessel, it should be 0.9 bar.

Dtp1979

Was only at one the other day. Small plastic shavings and no filter on the inlet were the cause!

whats_up

Thanks guys, I will have a look at the taps and cisterns now. The plumber was saying it might be debris in an inlet valve and would be the cause of the previous non-stop running of the pump.

the air tank is at 1.1 bar by the way according to my bike pump

TPM

could also be the flow switch on the pump, have seen the magnets break up in a few monsoon pumps recently.
but I generally find it to be the ball cock in the toilet cistern.