Potterton Kingfisher boiler overheating?

Ray, Did you ever solve the problem? Our 5 year old Kingfisher has started doing exactly the same. The header tank is full and have bled the system recently to eliminate any air. I have also noticed that as it switches off the internal relay clicks many times after the burner has gone out, as though it is trying to start again.

Eleman
February 2010

May be a silly question, but have you checked the water level in the Feed and Expansion cistern in the loft, if the Ball valve is stuck, the system may be short on water, causing excessive residual heat build up leading to the boiler overheating

www.elanar.co.uk
September 2009