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Just a bit of background to get started.. Rewind about 5 years and suddenly on one cold winter, I realise that the radiator in my bedroom isn't heating up. After freezing my *******s off for a few days I decide to try and fix it. Not really having a clue about plumbing all I could think of...

It's not the broadband signal that is filtered, its the telephone signal actually.

We had this, and had everything suggested, air in the system, pressure to high, pressure to low, etc etc. One day I went to sort it on my own and I found the radiator that was causing it - turned out it was because the control knob for the TRV had come very lose. Tighened it up and it hasn't...

Thanks for you help, 'night.

Seeing as the hot weather seems to now be here and we're only having a cold day here and there we're not too worried about sorting it - if it was the middle of January I'd have it done in a flash! Fixing the wiring is too big a job for me to undertake just to have the heating working just in...

Sorry, I can see how that is confusing! If the CH is switched on, but the valve doesn't seem to be on (indications: no ticking noise, lever wont move all the way) - Boiler does not fire. If the CH is switched on, and the valve is on (indications: lever moves freely, no ticking noise...

House is most probably going to developers, and we're hardly going to not tell them about this. I'm sorry I'm not sure that I understand - is it correct if the CH starts the motorised valve and fires the boiler, or if it doesn't fire the boiler? Whether the valve is powered or powered...

To cut a long story short, the motorised valve on our CH system seems to have failed. Recently we've been having problems with it taking it's time to start, and then sometimes not coming on at all. Now it just won't come on. I did manage to get it to start pumping last night but then before bed...

Could this be water from the hot water supply piping (as in the piping that supplies water to the boiler for hot water purposes - as is seperate from that for central heating) getting into the central heating piping some how?

Last night before going to bed I could hear a tapping sound coming from somewhere near the boiler, couldn't find anything though so I just put it down to the noise that the flue sometimes makes after having the heating on. Went down this morning to check again and a pipe with a pressure gauge...