High Pressure - Is there air trapped in the system?

[vonsworld]

Hello

I have a Worcester condensing boiler and recently changed the towel rail in the bathroom. I filled up the new towel rail and then topped up the boiler a little to return the pressure to normal.

However, now when I run the boiler the pressure goes up high to 3 bar.

So I bled the radiators when cold so that the pressure was back at the recommended 1.5 bar. But when I run the boiler again the pressure rises to 3 bar.

Is this because there is air trapped in the system? Is there anything I should do other than keep bleeding the radiators?

Thanks for your advice

Robin

 

[ianmcd]

you have an expansion problem

 

[Madrab]

You need the boiler serviced, quickly, before the PRV starts to stick open

 

[ianmcd]

You need the boiler serviced, quickly, before the PRV starts to stick open

You could do it with your stirrup pump

 

[Madrab]

You could do it with your stirrup pump

And your spinach arms