This is a bit of a strange issue. When running the hot water with the tap fully open the water only gets warm but does not get hot, but if i turn the tap so its half open (Rather than fully open) the water gets hot?
Hi Mike
I know you posted this year's ago and there's almost zero chance you will read this. But do you or does anyone else know what caused this and whether or not it is a job that can be done my a none professional
Thanks
Elliot
Elliot
February 2021
Sounds like the plate heat exchanger is getting scaled up inside, replace it and make sure you have a good scale reducer like a combimate fitted NOT one of the cheap inline reducers.