G
GA@46
hi my boilers flue is like a car running with it's head gasket blown lots and lots of steam that's for the first hour and then it clears up. last week it wouldn't light up and I had to strip it to find and fix the fault and looking at the heat exchanger I noticed some dried up leak stains, as I had to wait 3 days for the parts to come I noticed that the dried up leak stains had become wet and drops of water were visible are these cast iron heat exchangers prone to leaks? and how big a job is it to replace it? could it be just condensation? it's 10 years old and free standing
