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Yes a magnaclean was installed at the same time! How do I tell if it's not been installed correctly?

No power flush. But it was flushed with solution. Might even have been x800

Update!! I have out some x800 in the upstairs rads on Saturday just gone and have run the heating for a number of hours each day since. Still no joy :( The lockshield upstairs are really hot but the TRV are not! Are these the wrong way round on my rads?

Excellent. That makes it a lot easier. Will give it a go this weekend. Thanks

Thanks Andy. Will get some and try Stupid question! How do I put this into the system as it is a sealed system.

Tried this no joy. :( Don't know if it worth noting but upstairs the lockshield valve is hotter than the TRV valve! Are they the wrong way round?

As per the topic title. The radiators upstairs are cold apart from 2 of them which are only lukewarm. Downstairs is fine and are nice and hot. Little background info, the boiler was changed a few years ago to a worcester combi. Since then these problems have existed. The radiators upstairs...

I'll try opening the valves fully upstairs tomorrow and see what happens. The rads downstairs only have one valve with two pipes going into to it (not sure what these are called). Will this make a difference?

yea they the same temp all over. No tank in loft since the new boiler. Sorry i'm not sure what the by-pass is! Any idea where i could find this? yep turned all off including downstairs.

15mm downstairs and 8mm microbore upstairs

Sorry! No they stayed the same as before and only got luke warm

To be honest no much really happened when i tried the balancing. Tried all sorts of combinations from closing all apart from one and then introducing another. Have spent countless hours over the last few weeks trying this to no avail. It was a local plumber that i know well that fitted...

Hi all, having to post for advice having tried all i have found on the internet. Background to problem is as follows. The radiators that i have upstairs do not all heat up properly, there is a total of 4 rads, 1 heats up as normal, 1 is probably about 75%, 1 is luke warm and the last 1 is...