Any Heating Engineers on Here?

[cyclone]

OK our pressure reliefs are set at 2.5, just replaced it last summer, leaking piece of crap

[Superfly Guy]

OK our pressure reliefs are set at 2.5, just replaced it last summer, leaking piece of crap

Roger, il try running just the one rad then move onto balancing before tickling up the pressure a little.

[Rickzayne]

Did you try running water through both legs?

I'd say it was definitely an airlock if it worked before.

If you drained the system completely and it's quite old, you might want to put some sludge remover in to it for a few weeks and re drain it, as if you do have microbore pipe work then even a small amount of sludge could slow the flow

[Superfly Guy]

Did you try running water through both legs?

I'd say it was definitely an airlock if it worked before.

If you drained the system completely and it's quite old, you might want to put some sludge remover in to it for a few weeks and re drain it, as if you do have microbore pipe work then even a small amount of sludge could slow the flow

Yep,

Didnt work before

Less than 10 years old, clean water came out, its a sealed pressurised system so no sludge, as above il try what has been recommended.

[Toxic]

Is you pump on the Max flow setting? most UK pumps have 3 settings on them, Slow, med, Fast. might be worth checking that too.

[Superfly Guy]

Is you pump on the Max flow setting? most UK pumps have 3 settings on them, Slow, med, Fast. might be worth checking that too.

Highest setting

[Superfly Guy]

Ive turned all the other rads off and now the cold one is toasty, il balance the system now and hopefully that will alleviate the pressure issue.

[Bryn]

If somebody hadn't already mentioned it, I was going to suggest that balancing might be the issue. We had a cold radiator ages ago (can't remember what caused it - might have been me b***ering about with the valves!) Our plumber sorted it out. He explained that the water takes the path of least resistance so, if there's too easy a path for it to take that misses out a radiator, then it will miss it out! Adjusting the return valves on all the rads in the right order was the way to go (seemed like a bit of a dark art to me!)

[Superfly Guy]

If somebody hadn't already mentioned it, I was going to suggest that balancing might be the issue. We had a cold radiator ages ago (can't remember what caused it - might have been me b***ering about with the valves!) Our plumber sorted it out. He explained that the water takes the path of least resistance so, if there's too easy a path for it to take that misses out a radiator, then it will miss it out! Adjusting the return valves on all the rads in the right order was the way to go (seemed like a bit of a dark art to me!)

yes mate, as my post above ive now balanced the system and there is a huge improvement across the board. Ive balanced central heating systems before but this new house is a lot bigger than those i have previously owned to the working out the order in which they heat up (and therefore their order in the loop) isn't easy on my own so some applied logical guesswork took place.

So due to mechanics and physics, the troublesome rad is as good as it will get due to the overall pressure available and the distance it is from the nearest feeder rad (head pressure drop).

Now i have moved on to my home network and some re-cabling.