My boiler has started to make noises when it first comes on and when the heating goes off. They are banging noises. All radiators are fine except the one in the front room which seems to be hot at the top and cool at the bottom. It is a new fin-type and I have 'bled' it to no avail. Please help. Thank you.

Brenda Isles, April 2007

warm at the top and cold at bottom is a sign of muck & sludge in system. and if you say your boiler is banging it sounds like the whole system could do with a flush through. if your system is full of sludge it will be rusting your rads.

hi-spec plumbing, April 2007