Mine is saying F0 also -
To be honest I hate this boiler and am trying to talk my hubby in to getting a new one. It keeps going wrong, had 3 PCB's, and several repair jobs. This is the final straw.
Turned it off completly and back on, press the resrt button it sounds like it's going to fire up then back to F0. It's on it last warning GRRrrrrrr.
Dont mean to be horrid but pleased someone else it having the same problem, I totally understand and you have me boiler sympathy.
Gail
June 2008