Triton shower handle will only turn halfway. Water is lukewarm

[Scott1433]

Hi all. Sorry I'm not a plumber so go easy on me. I have a triton shower (see images) below, I don't know the model as it was here before me. Basically you have to turn the handle anto clockwise for hot water, off is the 6 o'clock position. However the handle will only go as far as between 12 o'clock and 1 o'clock. If you look at the image below that's as far as the handle will turn, meaning I can only get luke warm water. I know you can calibrate the temperature by turning the valve with an allen key, but that isn't the issue. The issue is that the handle physically wont turn far enough. Anyone familiar with this shower, any suggestions? Thank you

 

[Deleted member 120897]

Likely the cartridge needs replacing, or at least some maintenance. If you email the photo to Triton or the Showerdoc, they may be able to advise further and supply the spare.