main combi 24 he pressure problems

[pjgas]

could someone please point me in the right direction when ch on the pressure rises till it blows of i have took filling loop off
still the same

 

[SimonG]

Aye somethings blocked, something needs pumping up or something needs replacing.

 

[pjgas]

all rads getting hot exp vessel at 0.5 what would need replacing thanks

 

[SimonG]

Sent you a pm

 

[pjgas]

thanks simon hopfully iys the first problem not the other two appreciate it mate

 

[neily01]

As simon has prob told you it Could be a knacked plate hex bleeding through into the htg system. Reduce system pressure to 1 bar and turn off cold mains in for a while to see if it stops rising, turn cold main back on to confirm if it rises new plate required. All with fill loop disconnected.

 

[buckley plumb]

does the pressure only rise when the heating is on or even when its off

 

[arran197]

I'd say vessel or blocked pipe to vessel.