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?
Worcester boiler dripping water?
Remove boiler cover?
Worcester Bosch 532/i Combi Boiler?
Vaillant F22 fault?
Remove cover off gas boiler?
British Gas 532/i Gas Combi Boiler?
How do I work my Storad storage heater?
Boiler cycle?
Vaillant ecotec 831 plus?
How to fix my fireplace?