Many thanks for the speedy replies. Looks like I need to replace the plate heat exchanger. Fairly straight forward??
I'm reasonably competent with a spanner!
Help. I'm having a strange problem with my boiler.The CH pressure keeps rising to about 3 bar.The top up link is removed so I've no idea how it keeps re-pressurising itself. When I turn on the hot water the pressure g/g goes up and then back when I turn the tap off.At present I'm relieving the...