Grunfoss shower pump problem

[smith steve]

I have a Grunfoss Waterfall Niagara 2 bar twin outlet pump on my shower, it's been installed for 2 1/2 years. Recently it suddenly came on while it wasn't being used. I isolated it, then tuned it back on which solved the problem. It was fine for a few weeks then it started doing it again. Now it is on continuous unless isolated. There are no leaks and the floating things in it are free and it is not scaled up at all. it has clip on plastic switches which I guess are reed type, is it likely to be these or perhaps the circuit board? I'd appreciate any advice - thanks, Steve :thinking:

 

[chris watkins]

Technical Troubleshooter

You have probably already found & tried this but just in case, worth a go. I take it, it is not the negative head type with the little vessel/s, Steve?

 

[markadams]

Technical Troubleshooter

You have probably already found & tried this but just in case, worth a go. I take it, it is not the negative head type with the little vessel/s, Steve?

Hi Chris,

It is not a shower pump but a mains cold water pump.

Mark.

 

[tolly]

The Niagara is a shower pump not a mains booster isn't it? The clue being in the "twin outlet" part of the OP?

 

[tolly]

Just seen your other thread Mark, im guessing you thought Chris replied to that thread

 

[smith steve]

I have a Grunfoss Waterfall Niagara 2 bar twin outlet pump on my shower, it's been installed for 2 1/2 years. Recently it suddenly came on while it wasn't being used. I isolated it, then tuned it back on which solved the problem. It was fine for a few weeks then it started doing it again. Now it is on continuous unless isolated. There are no leaks and the floating things in it are free and it is not scaled up at all. it has clip on plastic switches which I guess are reed type, is it likely to be these or perhaps the circuit board? I'd appreciate any advice - thanks, Steve :thinking:

I've found out by process of elimination that it is one of the reed switches, just unplugged them one at a time from the circuit board. I'm trying to find a replacement one. Curiously it runs how it should with just one fitted - so I can take my time!
Thanks to all who tried to help