Recent content by rockhallrise

I have not used a de-sludging chemical. (But did drain a bottom rad and was clear water, just slightly grey, even blew in the bleed hole to get every last drop out, just slightly grey). I have tried switching off all hot rads upstairs, no appreciable difference downstairs, then tried...

OK, Just found a very similar thread... //www.diynot.com/forums/viewtopic.php?t=45459&start=0 Same make of boiler, except I have a different pump and valve*, a grundfos pump and silver box shaped honeywell valve. (*Just noticed that unlike the other thread my valve may not be a...

My problem is actually "upstairs radiators hot, but downstairs cold" I was just curious if the original poster had fixed his wider problems with a new pump. (Although his original topic was "Upstairs radiators won't fill up after draining?" he tried lots of things and sometimes got his...

Tank is filled and ballcock working, I cleaned it out whilst I was there so I didn't drag any more gunk through whilst trying to fix original problem which was cold radiators downstairs but hot upstairs. I drained a downstairs radiator to see if it was sludgy and the water drained out clear...

So was it the pump after all?? Been following the thread as I have a similar situation. So would be great to know what your resolution was....