how can i fix a Potterton Suprima 50 Boiler?

Circulation is the problem. Lack of good circulation or no circulation at all causes the boiler to overheat and as a safety feature, the overheat stat shuts down the boiler till it is cool and safe enough for the boiler to resume work. Powerflushing can solve the problem but not necessarily at £700 quoted. Even ordinary chemical flush could help you. Pls check your pump & diverter or zone valves to confirm that you have good circulation and your problem will be over.

oke
December 2008