While you wait for answers, we may have found some information which could help you.
Success
Message
Vaillant F22 fault?
Worcester boiler dripping water?
Siemens RDJ10RF thermostat problem?
Worcester Bosch 532/i Combi Boiler?
Boiler cycle?
How do I work my Storad storage heater?
Advice?
Fan tries to run every 15 seconds then stops immediately?
British Gas 532/i Gas Combi Boiler?
Vaillant ecotec 831 plus?
Greenstar 25 combo boiler?
Remove boiler cover?