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I don't know if this is any use. I use a memory tester that comes as part of the Mandriva Linux installation disk. I think most Linux disks include it. To obtain it you need to either download the iso image and burn it to a CD (just under 700 MB) or you can buy a cheap CD from an online...

Got that. Proper thick insulation on that rad. Sometimes it works a little, sometimes not at all. But just by turning valves down and bleeding,as well as pressurising to almost half a bar (red needle was set by engineer at half a bar when the system was sealed) we have heat in the bedroom...

I'd already tried turning off the bathroom rad, but the other hot ones had seized valves. So, WD40 allowed me to turn one off, but the hottest needed a gentle application of mole grips to get it started. With all 3 hot rads off, the bedroom rad started to get hot, then cooled down. Bled it and...

The header tank does have water in it. When the system was flushed I was told that chemicals were added. The three hot rads are closest to the boiler and pump and the both pipes are hot until the last (and hottest) of these. Then both pipes are cold. The pump is about three years old

About 23 months ago I had my system power flushed and sealed,as none of my radiators were getting warm. My boiler is a Baxi back boiler and I live in a Park Home, with a Calor Gas supply. One of my radiators, with a pipe that is taken into the open air, is often cold and takes a very long...