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