While you wait for answers, we may have found some information which could help you.
Click here for Boiler Potterton 50 Workingpotterton kingfisher boiler central heating not turning on?
Central heating radiator doesn't gets hot sometimes and sometimes does?
My radiators will not go off?
Pottertton Kingfisher Boiler Overheating ?
Where can I get instructions for potterton Kingfisher II?
Potterton kingfisher 2ignition problem?