Plumbing

Thermostatic shower going hot and freezing cold - shower tap was recently changed

Anonymous user 09/03/2024 - 3.15 PM

Hello! Our thermostatic shower keeps going from hot to freezing cold. At first issue was only occasional, now it happens every time we shower. Other taps in the flat change temperature slightly but not to freezing cold. We recently had an engineer to clean plate to plate heat exchanger and we also bought new shower tap. Our suspicion might be that the boiler got dirty again and plate to plate exchanger might be dirty as boiler has no filter. Boiler is gas Worcester Greenstar 25Si. Heating works fine. I was hoping maybe someone could think if any other ideas what could be wrong?