Boiler not connecting to Extension kit
Hi I’ve just finished wiring in an extension box to my Worcester Greenstar boiler. It’s powered up and connected fine, but the thermostat isn’t firing the boiler. I have a flashing radio connection symbol on the boiler- indicating, I guess that the boiler can’t connect to the old Worcester digitstat If I put the batteries back in the old thermostat it still works. Any ideas what’s going on?