Clicking Noise In Rad

[planemad]

Vaillant Eco 831 combi boiler, one rad in the bedroom constantly make a slight clicking noise.

Very Slight but it is there, rad has no air in it as I have bled it.

Any Ideas.

 

[John506]

does the clicking stop when you adjust the TRV?

 

[Burnerman]

Not just gently expanding with heat, do you think?

 

[planemad]

Its clicks constantly when the heating is running, I'm pretty sure its not expansion and contraction.

TRV is set to max currently with the cold spell, as the system is new I have yet to try the TRV at a lower setting.

the clicking noise seems to be comming more from the return side of the rad.

My flow enters on the TRV side.

 

[John506]

Try opening the lockshield more?

Are you sure the TRV is on the flow side, did you fit it?

 

[planemad]

Yes I laid all the pipe work before the boiler was installed.

Also the TRV pipe get hot first.

 

[John506]

can you compare the noise to something?

 

[planemad]

its the same noise that I would expect from expanding and contracting metal.

A bit like when you have been fast in your car then when you turn the engine off you hear a clicking noise of the exhaust contracting.

Its only minor but it is there.

 

[mickyg]

its the same noise that I would expect from expanding and contracting metal.

I'm sure there's a clue in there somewhere

 

[John506]

99.9% sure it will be thermal expansion now you compare it to the car engine

 

[planemad]

Sorted now, I have turned the lockshield down a turn and this has stopped the clicking.