Not sure if ukwhitegoods covers boilers! We had ours serviced a week or two ago and now it’s throwing out huge quantities of water from the flue almost seems too much to be condensate! We also get L.f codes often now and I wonder if this is water extinguishing the flame! Any ideas if this is a quick fix or do I need engineer back? Boiler is a ideal lycos.k
I wouldn’t chase about trying to find an answer to your problem, get the engineer back and in the meantime I wouldn’t try to use the boiler, just to be on the safe side.