dont think it is the rads, think theres air in the system, and the whole thing needs draining, as its booming and the pressure gauge keeps flicking back and two, but i really have no idea whats up with it, but i do know its freezing
my boiler is making a funny gurgling sound and i have no instructions on it cant bleed any radiators as there is no valve on any of them, it also has this strange large red this above it, can anyone help a single mum whos freezing to death lol