Thanks for that.
I did try turning off the power and recommissioning, but not matter what I do, the signal light remains on. The boiler seems to be functioning perfectly well other than the fact that I have to use the override button to turn the heating on and off. The digistat also seems...
I just noticed that there was no display on our digistat (note; there has not been any 'battery low' display). So I changed the batteries but the red signal light is still on constantly on. So I followed the instructions for 'Red LED Continually On'. Still no change.
Finally I followed the...