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