Knocking radiator - any advice?

[Smk80]

The ridged collar ,on far right unscrews and the actuator head can be removed from the valve body. Show us a pic once removed of the body on the rad

 

[Smk80]

The ridged collar ,on far right unscrews and the actuator head can be removed from the valve body. Show us a pic once removed of the body on the rad

thanks

 

[terryplumb]

Leave the actuator head off ,and see if the problem Occurs the next time heating comes on.
At present, push the pin that's sticking out in the centre of the valve body , quickly a few times, see if you can replicate the knocking sound, put a spoon over it so your finger isn't pushing directly on the pin.

 

[Smk80]

The ridged collar ,on far right unscrews and the actuator head can be removed from the valve body. Show us a pic once removed of the body on the rad

 

[terryplumb]

Leave the actuator head off ,and see if the problem Occurs the next time heating comes on.
At present, push the pin that's sticking out in the centre of the valve body , quickly a few times, see if you can replicate the knocking sound, put a spoon over it so your finger isn't pushing directly on the pin.

Have you tried ? Why have you posted the same picture again ??

 

[Smk80]

Have you tried ? Why have you posted the same picture again ??

Thanks sorry kept saying 'not uploaded' on my laptop. Will give your advice a try thanks for taking the time out of your Sunday to respond really appreciated

 

[Bod ...]

Hi all,

I have a rad that has suddenly started making a loud knocking noise when the heating comes on, usually last about 5mins. It's a relatively new rad, installed 4 years ago. I've tried adjusting the flow and return but this hasn't stopped the knocking.

Any idea what might be causing this and tips to sort it?

Let it in out of the garden it might be cold

 

[Smk80]

Let it in out of the garden it might be cold

Hillarious