to refill a 24 you need the white plastic key which comes with the boiler. its inserted and twist locked in on the bottom of the boiler in a black housing. (may have white grill to pull off first). Then there is a grey wheel to turn and allow water into the system. when topped up. shut off grey wheel and remove key. (small amount of water will emerge to but thats normal)
iain
March 2008
I can answer this question...
i have a worcester combi boiler 24cdi and i cant find how to fill the tank?