Mira excel won't switch off

I know you've answered a similar question here, just need to be clear please. For some time the control on/off has had some resistance when turned. More recently the unit will switch on but will not switch off electrically when returned to closed position. I think a new cartridge will solve this but note you advise new cut offs. Please include the link to the cut off page with reply. Many Thanks!
Asked 10 years ago by Anonymous
This item fits non electrical mixer showers, see the products at the bottom of the page.
I also see no reference to " but note you advise new cut offs." so cannot help with this part.

Answered 10 years ago by Anonymous

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