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