My boilers mate continually runs, except for switching power off it continually runs the central heating. The separate thermostat is working fine but no matter what I do the boilers mate keeps the heating on. I have tried the little switch insude the clocki on the off position, the timer position and the on position controlled by separate thermostat all keep heating on. My house was like a sauna this morning. Any ideas, of what I have read it looks like it may be the sensors but not sure.