hi
I need help with my boiler.
When i run the hot water the boiler lights normal but the high flame on the burner stays on and does not regulate down causing the boiler to overheat and shut down then restarts again and again,changed the dhw thermostat and diverter valve and they seems to ne a good flow of water around the system. any help much appreciated. ps central heating seems fine.
thanks neal

neal, August 2010