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?
Vaillant ecotec 831 plus?
Worcester Bosch 532/i Combi Boiler?
How do I work my Storad storage heater?
Worcester boiler dripping water?
Remove boiler cover?
Boiler cycle?
Vaillant F22 fault?
Remove cover off gas boiler?
Siemens RDJ10RF thermostat problem?
British Gas 532/i Gas Combi Boiler?
How to fix my fireplace?