While you wait for answers, we may have found some information which could help you.
Success
Message
Worcester 30 Cadillac combi boiler won’t fire up and the EA?
Vaillant F22 fault?
Remove cover off gas boiler?
Remove boiler cover?
How do I work my Storad storage heater?
Worcester boiler dripping water?
Vaillant ecotec 831 plus?
Oil fired boiler thermostat?
How to fix my fireplace?
Greenstar 24Ri boiler, fast flashing - can I reset?
Siemens RDJ10RF thermostat problem?
Boiler cycle?