Overflow dripping from a combi boiler

[Tobygump]

I have recently moved to a new house where there is a combi boiler.

the overflow started to drip a few months ago and my central heating guy came round and put a new valve in. This stopped the dripping.

However, it has now come back again, albeit not as much as before.

The valve was a 2-bar valve. However, the pressure gaguge reads 2.5 ish. My central heating friend said that this should not cause the overglow to drip.

I cannot reduce the pressure by any means. How can I do this and is this the cause of the dripping?

Thanks for your help.

 

[COG]

The dripping pipe is from the pressure relief valve ,they are usually 3bar.Your system pressure when cold should be between 1 and 1.5 and rise to around 2 ish. drop the pressure when cold useing the drain point (see boiler instructions often inside of lid ) DO NOT manually open the pressure releif valve or ot will never stop dripping (muck in valve seat ).allso check your top up loop/filling loop is disconected. ps what type of combi is it ?

 

[Tobygump]

The combi boiler is an ArisrelaeuroCombi SX 20 MFFICE.

Unfortunately the previous owner did not leave an instruction manual so I am at a loss to find where I can release the pressure.

Can you point me in the right direction of how to do this?

Thanks!

 

[Tobygump]

[Sorry, the make is:

ARISTON EuroCombi SX20MFFICE

 

[breezer]

you can release pressure by bleeding a radiator (takes a while)

Often after bleeding radiators you have to re pressurise the system, so you can releas pressure by bleeding