Aqualisa Quartz Digital not getting hot enough

[pwjmorley]

I've have had my Aqualisa Quartz Digital shower for about 6 years and haven't had any issues up to now. I recently turned down the Combi Boiler so to heat to the Eco setting. This turned down the heat for the shower as expected, but not warm enough so then changed the boiler back to 75 degrees.

From this point onwards the shower dial has to be turned to the max, to get decent heat. If you go back a few notches the temperature cools off significantly.
I have turned off/on the main electrics to it so it resets, which has not worked either. Other than that the shower works fine and is still powerful.

Can you advise what might be the issue and how it can be corrected?

 

[Madrab]

What digital shower is it? There is usually a factory set limit but that is a max limit and shouldn't alter the output as long as the input is above the min limit.

You say you set the boiler to 75deg, I have a feeling that will be the system water temp and not the HW output temp. I don't think I've ever come across a boiler that allows the HW output to be set that high.