my boiler has been switched off in an empty flat for 3 months when i ask for hot water i get warmish hot water but at the same time the central heating rads get warm but when the hot tap is turned off the central heating doesn,t come on any clues the diverter valve could be stuck how is this freed ?

williams, March 2008

There is no repair other than changing the valve for a new one as I have had to do twice because the motor coil had failed in our last house. Seems to be a diverter valve design problem. Easy enough to change as long as you can get a spanner on things but you will have to switch off the electricity to disconnect the wires and drain the system below the valve level. Make sure you fit the right new one the correct way around. I marked the pipe with an arrow and took the valve to the Plumb Centre with me to ensure I bought the right one. Hope this helps.

johnyonenote, March 2008

There is no repair other than changing the valve for a new one as I have had to do twice because the motor coil had failed in our last house. Seems to be a diverter valve design problem. Easy enough to change as long as you can get a spanner on things but you will have to switch off the electricity to disconnect the wires and drain the system below the valve level. Make sure you fit the right new one the correct way around. I marked the pipe with an arrow and took the valve to the Plumb Centre with me to ensure I bought the right one. Hope this helps.

johnyonenote, March 2008