Vaillant ecotec 831 plus?
Worcester 30 Cadillac combi boiler won’t fire up and the EA?
Boiler cycle?
Fan tries to run every 15 seconds then stops immediately?
Greenstar 25 combo boiler?
Ideal Isar H30?
Vaillant F22 fault?
Greenstar 24Ri boiler, fast flashing - can I reset?
Have I got got a faulty programmer?