Trevi shower - very small temperature adjustment range available now

Hi My Trevi shower is now very difficult to regulate the temperature. Rotating it 1mm at a time produces a massive temperature variance. To hit the sweet spot of not too hot or too cold is difficult. What do i need to strip down or replace? PS photo is at 90degrees to actual (thermostatic valve is at bottom
Asked 5 years ago by Martyn
www.showerdoc.com/ideal-standard-wittlich-3-4-thermostatic-cartridge-d-08-s960134nu

This is the part that you may need. The back of the cartridge plastic cross may be broken.

Answered 5 years ago by Barrie Seabright

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