Radiator pops when heating comes on

[gdonald20]

Hi

I have a combi boiler and 4 radiators in my central heating system.

I bled all of the radiators a few months ago and 3 of the 4 of them appear to be fine. I the past 2 weeks the radiator in my bedroom has started making a popping noise when the heating comes on.

It pops every couple of seconds for about 3 minutes when the heating comes on and then stops.

I tried bleeding the radiator but there wasn't any air coming out.

Any idea what could be wrong?

Thanks

 

[Gasman62]

Sounds like natural expansion noise to me??

 

[gdonald20]

I just wondered because i've lived in the flat for 18 months and it only started making this noise about a fortnight ago.

Thanks

Gillian

 

[stuartggray]

Try pressing down on the top of the radiator to make sure it is firm on it's mountings.

 

[doitall]

If one has had the rad off for decorating etc, then suspect one has lost the plastic spacer.