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