Pressure on boiler shooting up

[Bathman31]

Hi all hope you can help, my pressure on my boiler is shooting up and blowing off after about ten mins, the boiler is a main eco 30. Think it’s the expansion vessel as pressed the shredder at the top and hardly any air in, can I take it out and re pressure it as can’t get pump in to do it witt it in the boiler?

Cheers in advance marc

 

[ShaunCorbs]

Nice easy fix but you need to get a gas safe engy in sorry to say

 

[Harvest Fields]

As above? Also has it been serviced recently?