Shower pump randomly turns on for a few seconds

[mattnarb]

Hello All, I've got a negative head shower pump which turns on randomly for a few seconds when not in use. I've checked that the shower and all the taps are off and that none of the taps are leaking.

A plumber diagnosed the issue as a faulty pump and installed a new Salomander 1.8 Bar Universal pump. Unfortunalely the new pump does exactly the same thing?

Any ideas as to the cause of the problem?

Thanks for any help.

 

[Ben-gee]

When you say shower pump, does it just do the shower or does it in fact supply more things?

If so, what else?

 

[mattnarb]

The pump does the shower, all taps in bathroom and taps in the kitchen.

 

[Gasmk1]

Does it do hot and cold if cold does your toilet flush valve pass so it tops up every so often

 

[mattnarb]

Yes, it does hot and cold. I'll check the toilet.

Thanks for your help