Hello, Normal conditions, Boiler on, Thermo 19degrees, timer on.
Heating on, heating goes past 25 degrees with no control of timer or themostat, Hw always available and not as required and not contollable temp (ie on the dial), Cant get any controls to take control of boiler, Constant ignition and boiler off, within 10 seconds of each other, this is constant repetition, Extraction fan is normally on 24/7, but since these ailments this doesnt come on to cool boiler when boiler turns off?
any ideas? thanks Martin