I have a British gas 330+ boiler which has stopped working today, over the morning have had faults f1, f4, f13 and f22 displayed, at moment it is f1 which suggests ignition problems. Have concentrated on condense pipe and am fairly sure this isn't frozen. I have reset many times and switched off at airing cupboard many times but with no joy. Earlier it felt like it had ignited but then f22 came up. Now it feels like it isn't even trying to ignite. The only other thing to note is on occasions when I reset it says 0.0 bar and other times 1.0 bar. There are no water issues upstairs from the header tank. I have also forced it to maximum with no joy, have run out of ideas so would appreciate any further ideas before I have to find an engineer