While you wait for answers, we may have found some information which could help you.
Click here for Combi Switch Broken
How do I work my Storad storage heater?
Siemens RDJ10RF thermostat problem?
How to fix my fireplace?
Remove boiler cover?
Worcester 30 Cadillac combi boiler won’t fire up and the EA?
Vaillant F22 fault?