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