My Worcester 350 combi has stopped working properly as when the thermo stat switches on nothing happens at the boiler end and does not turn on the Central heating. The hot water comes on as normal. The pessure is fine, the overheat switch has not tripped, all fuses within the boiler are ok and everything was working correctly the night before. Any suggestions?

Ian.F., November 2008

To answer my own question! It was the room thermo stat that was duff.

Ian.F, December 2008