Banging radiator

[tom79]

Hi,

I have a combi boiler and 1 radiator upstairs is making a banging noise when the heating is turned on.

I have tried bleeding all the radiators and no air came out, just clear water.

I have checked the pressure and its around 1.5 to 2 PSI when running.

It seems to actually come from the radiator and not pipes leading up to it.

Any ideas?

thanks

 

[jgmgasservices]

Does it have a TRV on the rad? If so when it starts banging turn the TRV if this stops it, thats your problem

 

[David_Jones]

Hi, had same issue some years ago and the plumber changed the water flow to the thermostat.

from feed to flow or flow to feed.