I have a no-name bar shower mixer that needs the temp turned up ever
higher to get a decent temperature shower.
Standard chromed bar, knob at each end, water outlet at one end nearest
the on/off tap and temperature setting at the other end.

I suspect the thermostat needs changing. Are generic parts available for
these? I expect they all come out of the same factory in china.

Anyone had success mending them or is it time for a new one?

TIA

Bob