Before you go splashing out on a new rad have you tried clearing possible airlocks?Quote:
Originally Posted by the 12 th man
If you have seperate hot and cold on your downstairs kitchen sink you'll need a length of hose pipe ( a foot or two should do it) big enough to connect both fossets. Might need to clamp them too. I got a lenght off an old washing machine that fitted sweetly. If your tap is a "mixer" (both hot and cold come out the same fosset) you'll just cup your hand tightly over the spout instead.
now turn on the cold tap and give it a few seconds to build up a bit of pressure.
now open the hot tap and the greater pressure from your mains cold tap should force water back through the hot water pipes and "blow out" any air pockets. It might take a while. If you go out to the back yard where your overflow pipe generally is you should see it splutter if there's a pocket before water runs out of it.
don't turn off the taps until there's an even flow out of the overflow.
That's airpockets sorted.
One other thing ...is the water in your hot press tank heating up when you've the heat turned on (as opposed to specifically turning on the immersion)?
If it isn't and if your problem radiator is close to the tank then your air pocket might be caught in the tank.
If you look at the tank there should be a closed off pipe coming out of it -probably at the back or side out of the way. It'll look like the pipe was just cut off, threaded and "capped". If you have an adjustable wrench or a spanner handy open the cap a little and it should bleed much like a bleeding a radiator. You should turn your heating system on for a while before doing this so the heat can build pressure to blow it out.