After repairing the centre control knob ie selector switch,I now have an error code CO showing in the display window.The boiler works for a short while then cuts out and I have to reset it.Any ideas anyone.Thanks

Chris, December 2008

New PCB...clears this. Common problem with Vokeras

Gas Man Dave, February 2020

I have got the same problem: but pressing the reset button no longer has any effect. When only hot water is on - it still shows CO, however when hot water and heating are both on, the CO doesn't appear any more, but the heating does not work (same as described above - works for a couple of seconds and then cuts off). Any ideas?

Lilia, December 2008

NEXT TO THE CH SELECTOR SWITCH THERE IS A SCREW TYPE PLUG UNSCREW IT USE A SCREW DRIVER AND PRESS THE BLACK TOGGLE TO DISENGAGE THE COMBUSTION MODE

JOHN, December 2008

CHECK YOUR WORK, YOU EITHER HAVE THE POTENTIOMETER ON THE DISPLAY BOARD 180* UP SIDE DOWN (IT SHOULDNT SPIN 360*) OR WHEN YOU SWREWED THE THE PCB BACK ON YOU MAY HAVE TRAPPED OR DAMMAGED THE CO BUTTON.

J, December 2008