Noisy Bathroom Radiator

10 Sep 2006
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United Kingdom
Hi all.

Only one of my 5 radiators is making a metallic rattling noise. I have videoed it here...

Any idea what it is? And how to fix it? Strange it is the only radiator making a noise?

It is a conventional vented heat only boiler with separate controls and pump in the airing cupboard.

Many thanks.
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Sounds like the water through the TRV or lockshield valve, that alternative is expansion of the old type rad but I'd suspect the valve first. Put your hand on the valve body, not the TRV head, can you feel it click move as it gets noisy?
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