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