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Hi guys , I need a bit of advice please...a few weeks ago I had a new gas filter fitted on my vailant combi. Its still under warranty thank goodness !! Now I have a leaking overflow pipe under the floorboards, not sure if it is an overflow or maybe an expansion pipe somebody said??!! Anyway the...

Hi guys, I have a vaillant eco pro 28 just 2 years old due for 2nd service , but it has just started to cut out (f28 and f29) when the heating is on and the hot water is run. Makes a few clicking banging noises when 1st switched on. Any help would be much appreciated.