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