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