Shower pump won't pump

[Davidgpa]

My Showerforce 3 bar twin shower pump buzzes when I turn a tap on but will not run. Situated within bath panel below level of cylinder (no room near cylinder), 22m pipes. Inlet head = 2.3m, top of hot water cylinder to bottom of cold tank=1.3m.
Have replumbed pump outlet straight into bath, pressure good with pump off but still won’t go. Thought the pump was faulty so replaced it: no go. Previous 1.5 bar pump works (15mm pipes) but poor pressure through single lever tap into shower head. Have used Vax to clear air from system.
I've run out of ideas.[/img]

 

[Softus]

Thought the pump was faulty so replaced it

I would have done the same thing.

no go.

Same symptom, or different? No whooshing or anything?
___________________

Edit: corrected stupid typo.

 

[chrishutt]

My Showerforce 3 bar twin shower pump buzzes when I turn a tap on but will not run.

It sounds like it's failed, perhaps one of the impellers is jammed. Are you saying a second pump did exactly the same thing? If it's located under a bath should it not be low voltage? Have you connected a mains voltage pump to a low voltage supply, or vice versa?

 

[Davidgpa]

Same model pump, I can hear the solenoid click when I turn on the tap, then it just buzzes just like the replaced one.
Uses mains not low voltage, cable is protected from water access.

 

[Softus]

I think you have two faulty pumps.

Was the second one brand new?

 

[Davidgpa]

Second one brand new, first should have been but cannot be certain (ebay).
Sounds like I should return the second one as faulty and get a replacement.

 

[namsag]

Have you checked you actually have 240v there, had it where there is a loose/broken neutral it will allow certain amount of current through but not enough to allow to work

 

[Softus]

How did I know, with 90% certainty, that eBay would feature in this story at some point?

 

[Davidgpa]

Thank you Namsag, you cracked it.
I ran a new cable and it hummed louder. Tried again after much blue language and it worked.
Many many thanks.