While you wait for answers, we may have found some information which could help you.
Click here for Potterton Kingfisher Thermostathow can I get my potterton kingfisher CF 180 to fire up?
My radiators will not go off?
Pottertton Kingfisher Boiler Overheating ?
Radiators upstairs will not go off after relighting Potterton Kingfisher ?
Where can I get instructions for potterton Kingfisher II?
Pilot light won't relight?