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