The central heating has been playing up for a few days now. I can
manually run the system using the lever on the motorised valve. i took
the motor off the valve and checked it using the thermostat and it
seems to work fine, i have tried turing the valve and that is easy to
move. The main problem seems to be that when i turn off the hot water
through the day and just have the radiators on the will not work. Once
i switch the hot water to come on the system works fine until you want
the rads off then you have to turn off the hot water. I have replaced
the thermostat with no change to the problem. the only thing is how
much should the valve open and close is it around 20 degrees because
thats all mine turns with the motor i thought it should be more ?
Please anyone got any ideas ?
Thank you all in advance........