[AndyG79]

My central heating is always on! We have a timer clock that should turn it on twice a day, however, if I turn the thermostat up when the heating should be off, it still comes! I have changed the timer clock as recommended by a plummer but it still doesn't work properly. Can anyone help?? :confused:

[ballengerb1]

Are you talking about a programmable therostat or actually some sort of clock? Programmable stats are over ridden when you manually raise the temp.

[labman]

Do you mean the furnace is running all the time, or just that the thermostat can kick the system on any time? It would be possible to wire a timer in so that either could turn the heat on, or that both it and the thermostat would have to call for heat to get heat.