hi there i have a ferroli f 24 b and the red lock out light keeps coming on if i reset the boiler it starts up again and after about 15 secs the red light comes back on it seems as tho it wont ignite i can light it manually with a match and the heating an hot water will stay on and even reignite in standby but when i switch the heating off (as i dont want it on all the time) when i switch back on the boiler wont light and red light comes back on, an engineer told me i need a new pcb so i bought one off ebay had it fitted and still have the same problem on this time it wont reignite in standby engineer is now saying he thinks the new pcb is a dud do you have any ideas on this problem and is there a way of getting the new pcb tested before i look for my money back or bye a new one - any help would be greatfully recieved