While you wait for answers, we may have found some information which could help you.
Click here for Potterton Kingfisher BoilerMy radiators will not go off?
Central heating radiator doesn't gets hot sometimes and sometimes does?
how can I get my potterton kingfisher CF 180 to fire up?
Radiators upstairs will not go off after relighting Potterton Kingfisher ?
how to repair potterton kingfisher?
Pilot light won't relight?