One radiator is not getting hot unless I turn down all the others, wait for
it to get hot and then turn the rest back on. At which point it operates
normally and doesn't grow cold.

Can anyone help with advice as to what's happening?

"Kavtek" wrote in message
...
One radiator is not getting hot unless I turn down all the others, wait
for
it to get hot and then turn the rest back on. At which point it operates
normally and doesn't grow cold.

Can anyone help with advice as to what's happening?



Bleed it man

Regards

Mick

On Dec 14, 7:54*am, "Micky Savage" wrote:
"Kavtek" wrote in message

...

One radiator is not getting hot unless I turn down all the others, wait
for
it to get hot and then turn the rest back on. At which point it operates
normally and doesn't grow cold.

Can anyone help with advice as to what's happening?

Bleed it man

Regards

Mick

Bleed them all of air, when cold then hot, then check water pressure
and fill only when system is COLD. you only need enough water to heat
the highest radiator, you may have enough, even to much now.

On 14 Dec, 13:54, "Micky Savage" wrote:
"Kavtek" wrote in message

...

One radiator is not getting hot unless I turn down all the others, wait
for
it to get hot and then turn the rest back on. At which point it operates
normally and doesn't grow cold.

Can anyone help with advice as to what's happening?

Bleed it man

Regards

Mick

If it can get hot when the others are turned off then it doesn't need
bleeding.

Sounds more like an issue of balancing to me - all the other rads are
taking all the flow and the dodgy one is suffering. A balanced flow to
all the rads on the circuit is achieved by fiddling around with the
lockshield valves to restrict the flow to those rads which would
otherwise hog it. The lockshield valve is the one that you don't
usually touch, it's probably covered by a removable plastic cap. You
could try to solve the problem by opening up the lockshield valve on
the cold rad. If that alone doesn't work then slightly close the
lockshield valves of a couple of the rads nearby. That should force
more of the flow through the cold one. However, random tinkering might
throw other rads off-balance, so count the number of quarter turns you
make so you can restore things to the status quo ante if necessary.

To do it properly is a bit more time consuming - see the FAQ at
http://www.diyfaq.org.uk/plumbing/rad-balance.html

Cheers!

Martin

"Martin Pentreath" wrote in message
...
On 14 Dec, 13:54, "Micky Savage" wrote:
"Kavtek" wrote in message

...

One radiator is not getting hot unless I turn down all the others, wait
for
it to get hot and then turn the rest back on. At which point it
operates
normally and doesn't grow cold.

Can anyone help with advice as to what's happening?

Bleed it man

Regards

Mick

If it can get hot when the others are turned off then it doesn't need
bleeding.

Sounds more like an issue of balancing to me - all the other rads are
taking all the flow and the dodgy one is suffering. A balanced flow to
all the rads on the circuit is achieved by fiddling around with the
lockshield valves to restrict the flow to those rads which would
otherwise hog it. The lockshield valve is the one that you don't
usually touch, it's probably covered by a removable plastic cap. You
could try to solve the problem by opening up the lockshield valve on
the cold rad. If that alone doesn't work then slightly close the
lockshield valves of a couple of the rads nearby. That should force
more of the flow through the cold one. However, random tinkering might
throw other rads off-balance, so count the number of quarter turns you
make so you can restore things to the status quo ante if necessary.

To do it properly is a bit more time consuming - see the FAQ at
http://www.diyfaq.org.uk/plumbing/rad-balance.html

Cheers!

Martin

As another guide to a simple fix. Start from cold and dash around to see
which gets warm the quickest. Make this the 1st target for throttling back
the lockshield. I would personally close it fully then open it half a turn
and do the cold start again.

On 14 Dec, 13:53, Kavtek wrote:
One radiator is not getting hot unless I turn down all the others, wait for
it to get hot and then turn the rest back on. At which point it operates
normally and doesn't grow cold.

Can anyone help with advice as to what's happening?

sounds like symptoms of system out of balance.

I wrote a piece for the FAQ on balancing .... not sure if it is still
there since it went web based.

If not send me a PM and I'll email you a copy.

Osprey wrote:
On 14 Dec, 13:53, Kavtek wrote:
One radiator is not getting hot unless I turn down all the others, wait for
it to get hot and then turn the rest back on. At which point it operates
normally and doesn't grow cold.

Can anyone help with advice as to what's happening?

sounds like symptoms of system out of balance.

I wrote a piece for the FAQ on balancing .... not sure if it is still
there since it went web based.

If not send me a PM and I'll email you a copy.

sounds like trvs and no balance doing what you would expect. Rads
nearest the boiler hogging the flow till they shut down.

In article ,
Kavtek wrote:
One radiator is not getting hot unless I turn down all the others, wait
for it to get hot and then turn the rest back on. At which point it
operates normally and doesn't grow cold.

Can anyone help with advice as to what's happening?

The water is taking the easiest path round the circuit - and that radiator
is obviously too difficult.

You sort it by making the existing path relatively more difficult and
forcing the flow into that rad.

This is called balancing the system - see FAQ for details.

--
*I just got lost in thought. It was unfamiliar territory*

Dave Plowman London SW
To e-mail, change noise into sound.

On Sun, 14 Dec 2008 16:09:59 +0000 (GMT), Dave Plowman (News) wrote:

In article ,
Kavtek wrote:
One radiator is not getting hot unless I turn down all the others, wait
for it to get hot and then turn the rest back on. At which point it
operates normally and doesn't grow cold.

Can anyone help with advice as to what's happening?

The water is taking the easiest path round the circuit - and that radiator
is obviously too difficult.

You sort it by making the existing path relatively more difficult and
forcing the flow into that rad.

This is called balancing the system - see FAQ for details.

Thanks everyone, I will attempt to balance the system then!

PS thanks for pointing me to the FAQ it'll help with some other stuff too.