Potterton Boiler does not respond to the controls?
My Potterton Boiler does not respond to the controls, i.e. It continues to run and does not respond to the controller switch, even when I put the slider to off on both the CH & HW, it does not respoent to temperature settings on the wall stat.
Do I need a new controller, it is 4 years old.
Regards
Ralph Irvine
October 2010