Have one of these in the spare shower room (installed 5 years ago, so perhaps our's an older model, but look identical as far as I can tell).
Rarely used, but recently started to misbehave. It has 3 water pressure button (low/medium/high), and then a dial to set the temperature. We have always had it used on the High setting, and the temperature dial at around the middle setting.
Now in the High setting the water temperature is far too hot (even with the dial set to minimum). In the Medium setting the temperature is too low (even with the dial set to maximum)...
I assume something to do with a thermostat? Is it worth preparing? Considering its working environment my top priority is safety of course...
TIA>