vokera boiler high pressure low pressure leaking water

[codie85]

where do i start???
my 3yr old voker boiler
1-will not fire up, fan running all normal sounds little blue on ignition but will not fir up (most of the time) after 29 attemps of resetting today it finally lit....
after 35-45 mis of heating been on the pressure rises to 3 and boiler cuts out.
pressure when boiler off then drops to zero. water flows out of pipe the runs down outside wall.
now and then boiler will ignite on 0 pressure.
ihave checked all wires blew andsucked all pipes nothing willwork.
had new fan fitted 2 wks ago made no difference.
loosing my mind its so annoying please help????

 

[picasso]

Your expansion vessel is flat or blocked, your boiler wont work if there is no pressure in it, get it serviced.

 

[codie85]

thanks for helping.
i had it done 6 weeks ago and nothing was picked up.

 

[codie85]

doyou think imany need anew expansion
if it is what you said in last post is there anything i can do myself to fix it

thank you