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