While you wait for answers, we may have found some information which could help you.
Click here for Radiator Central Heating
Boiler cycle?
Worcester 30 Cadillac combi boiler won’t fire up and the EA?
Greenstar 24Ri boiler, fast flashing - can I reset?
Worcester boiler dripping water?
One radiator in a bedroom is always cold?
Vaillant ecotec 831 plus?