Hi Danny,
Have you had any luck fixing this? We're having the exact same problem with ours - no heating, but hot water. We've been told we need a new boiler!! We're trying desperately to avoid replacing it, so if you've found out what's wrong please let me know! (Or if anyone else can shed any light please feel free)
Thanks.
Prisca
April 2010
with the unit being a combination boiler i would firstly suspect the external controls are not calling, after that all would be internal faults so id call in an engineer.
out of interest what is the screen showing bar pressure or temperature?