While you wait for answers, we may have found some information which could help you.
Click here for Boiler Start FineI have a 30cx glowwarm that is showing F4 as fault.I have no hot water?
My central heating is not working?
fitting thermostat?
I have moved into a flat am dissabled carnt get heating on unit flashing F1?
How to fix glow worm 18 hxi ?
My radiators not heating up?