Rising Boiler Pressure

[gemmybear83]

Hi I have a fairly new worcesterbosch boiler (9 months old), have just started putting the heating on the last couple of weeks and I noticed that that pressure had risen over past the "2" mark, so I bled the radiators and refilled it (I think I let too much out!). When I refilled the system I filled it up to "1" , and have now noticed a few days later that the pressure has risen again and now it is switched off but the pressure is at "1.5" (this is after a few hours of it being switched off) - its never goen over the "2" mark when swtiched on, and is falling after I have it on but the pressure isnt returning back to where I set it for.

Can anyone help? Sorry if this is an obvious question but I am new here!

 

[gemmybear83]

Sorry just bumping this - any advice?

 

[gas4you]

Setting the pressure to about 1 Bar then seeing it rise to about 2 Bar when the radiators are on and hot is quite normal.

If it kept going above 3 Bar then you would have a problem.

 

[gemmybear83]

No - its when the radiators are swtiched off the radiators are not returning back to their original "1" position it has risen to "1.5". Sorry if I was not clear in my original post!

 

[gigz]

Did you disconnect the filling loop after topping up the pressure ?

 

[gas4you]

If it is happening without the system getting hot, the there are only 2 possibilities.

Filling loop letting by or plate HE pin holed, assuming it is a combi