When i turn the hot tap on it heats up all the radiators but no hot water from the tap?? please someone help

Lee Fleming, September 2008

Thank You for replying so quick! If I give this a go and it doesn't seem to make any noises, does that mean the servo valve motor has gone?? If so how expensive do u think it might cost to have repaired?? Thanks again for your reply! Will test in the morning!

Lee Fleming, September 2008

I take it you mean britony combi 80, it has a 3-way valve which changes between hot water and heating, they are prone to sticking while in either position. In my experience it is usually due to the system not being flushed after installation, the fluxes after a period of time cause corrosion which jam the valve. You can check valve operation, turn off power to boiler, select water only so heating is off, turn isolation switch back on and you should hear the servo valve motor turning for a few seconds before coming to a stop.

Engineer de Gaz, September 2008