Hi, we get a clicking noise from two of our radiators when the heating
comes on/off. They are the largest radiators in our main bedroom and
living room. It's not a very loud noise but in the silence at 6:25 in
the morning it is really annoying!

As the other radiators are unaffected I assume it's not coming from the
boiler or air in the pipes. I've put lagging around the pipes in these
rooms where they touch joists etc and removed any air from the rads ,
all to no avail.

The central heating was only installed about 18 months ago and the
first winter we didn't notice the problem.
I suspect it may be caused by the radiator not having the plastic clip
where it is hung on the wall bracket and the expansion of the radiator
causes movement. The top half of the rad gets hot before the clicking
starts. The rads were removed for decorating etc last summer so the
clip may not have been replaced.

does this sound plausible before I get the plumber out to test this
theory?

wrote:
Hi, we get a clicking noise from two of our radiators when the heating
comes on/off. They are the largest radiators in our main bedroom and
living room. It's not a very loud noise but in the silence at 6:25 in
the morning it is really annoying!
snip
The central heating was only installed about 18 months ago and the
first winter we didn't notice the problem.
I suspect it may be caused by the radiator not having the plastic clip
where it is hung on the wall bracket and the expansion of the radiator
causes movement. The top half of the rad gets hot before the clicking
starts. The rads were removed for decorating etc last summer so the
clip may not have been replaced.

does this sound plausible before I get the plumber out to test this
theory?

Try pushing and pulling on the radiator while it's clicking.
If the clicking is unaffected, it's unlikely to be the fixing.

In an earlier contribution to this discussion,
wrote:

Hi, we get a clicking noise from two of our radiators when the heating
comes on/off. They are the largest radiators in our main bedroom and
living room. It's not a very loud noise but in the silence at 6:25 in
the morning it is really annoying!

As the other radiators are unaffected I assume it's not coming from
the boiler or air in the pipes. I've put lagging around the pipes in
these rooms where they touch joists etc and removed any air from the
rads , all to no avail.

The central heating was only installed about 18 months ago and the
first winter we didn't notice the problem.
I suspect it may be caused by the radiator not having the plastic clip
where it is hung on the wall bracket and the expansion of the radiator
causes movement. The top half of the rad gets hot before the clicking
starts. The rads were removed for decorating etc last summer so the
clip may not have been replaced.

does this sound plausible before I get the plumber out to test this
theory?

Yes, it's most likely to be the rad moving on its bracket due to expansion.
--
Cheers,
Set Square
______
Please reply to newsgroup. Reply address is invalid.

Well, well - and there's me been thinking all these years that it was
due to the expansion of the pipes on the long straight run to our
bedroom ! I will now check the radiator supports but I suspect that my
original explanation is more likely.

Rob

On 25 Jan 2006 05:07:47 -0800, wrote:

the expansion of the radiator causes movement.

That is what is causing the noise. Expansion against a "sticky"
surface tension builds up enough to overcome the stickion and "click"
or on the case of one of ours "doing" quite loud... Track down the
sticky contact point and lubricate it, not sure what with oils will
evaporate, grease will melt. Graphite powder?


--
Cheers
Dave. pam is missing e-mail

On Wed, 25 Jan 2006 14:31:58 +0000 (GMT), "Dave Liquorice"
wrote:

|On 25 Jan 2006 05:07:47 -0800, wrote:
|
| the expansion of the radiator causes movement.
|
|That is what is causing the noise. Expansion against a "sticky"
|surface tension builds up enough to overcome the stickion and "click"
|or on the case of one of ours "doing" quite loud... Track down the
|sticky contact point and lubricate it, not sure what with oils will
|evaporate, grease will melt. Graphite powder?

Candle grease is traditional.
--
Dave Fawthrop dave hyphenologist co uk
17,000 free e-books at Project Gutenberg! http://www.gutenberg.net
For Yorkshire Dialect go to www.hyphenologist.co.uk/songs/

This is what I love about this type of Forum. Your browsing through and all of a sudden you see a problem that somebody has which is exactly the same as yours then as you read through the solution is revealed (that clicking noise is quite loud at 6:30am) But best of all you get new words like "stickion"
Dave, I'm not having a go at you just loved the word. Reminded me of my daughter who was wrecked and knackered at the same time .....WRECKERED

On Wed, 25 Jan 2006 23:02:57 +0000, Fatboise wrote:

But best of all you get new words like "stickion" Dave, I'm not
having a go at you just loved the word.

Pity I didn't spell it right, "stiction".

http://en.wikipedia.org/wiki/Stiction

--
Cheers
Dave. pam is missing e-mail

Thank you all for your replies.

I've managed to put some wd40 on the wall bracket which seems to have
solved the problem but I'm not sure if it will evaporate in a short
time?
If so I'd rather get the plumberto take off the radiator now and put
the plastic bracket on before I lay carpets.