Hi, I have a combi boiler, with a wireless Worcester Digistat thermostat. The signal between the Digistat and the boiler is fine - i.e. I can turn the heating on and off and use the timer. The fault is with the Digistat - the thermostat pert of it does not seem to be working - i.e. set temp to 21 but the heating never turns off and the house gets hotter and hotter. Basically, without the thermostat, it is just an ON/OFF switch. My question is, can I buy a new Digistat to communicate with the card in the boiler, and how do I know which Digistat to buy? Oh yes and where can I get one from! Thanks guys.