When I switch the water on, the heating is also coming on at the same even though the heating is switched off. What is causing this and how can it be fixed.

abi, February 2008

Hi Abi,

Sounds like a possible problem with your diverter valve.
Under normal conditions it diverts the water to either the dhw or the ch, but may be stuck in a mid position or something.

Could replace the diverter valve, or maybe easier to call out a technician.

Tony, February 2008