I have a thermostatic shower, but I can only get it to be luke warm. The aquastat is set at 60, boiler at 165. The tap water in wash hand basin beside shower is very warm. I have taken the cover off the thermostat and there seems to be no adjustment. This seems to be the shower I have.
the thermostatic cartridge looks like
i have turned the spindle as far anti clock wise as possible but only turns one full turn is there an other way to adjust it
Best Answer
Shower valves normally have a mechanism for adjusting the maximum water temperature under the handle. You'll have to consult the shower valve's manual for specifics. If you don't have the manual, here's a picture of a typical shower valve. The red part of the valve is the temperature safety. It is located under the shower handle and you rotate it to adjust the temperature.
Update: This document seems to describe the procedure to adjust the temperature of your shower. It looks relatively complex, but doable.