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