might just need a new thermocouple simple cheep job should be replaced during every service.or could be over heating due to an air lock in the system or a blockage. is the water circulating ? are your rads heating when boiler runs?
john wyane
December 2008
I can answer this question...
Worcester/Bosch combi boiler keeps shutting down need re-igniting?
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.