Hello everyone. I'm a very novice DIY person. Our boiler has developed an F28 fault. We had the same problem in the snow last year. The pressure gauge was OK but I have checked it and restarted the boiler but it still keeps cutting out and going back to the F28 fault status. Does anyone have any idea what I could do. I think my chances of getting an engineer before Christmas are slim and it's very cold in here.