Vizo boiler, pressure dropped so wont ignite please help.

[kevplumb]

There will be some kind of valve at the pipe 4 end of the flexible hose. It may be a screwdriver slot.

i hope there isn't it's the condense drain

View media item 11214
thats the sort of flexible pipe your looking for

possibly on the end of the tee on the left hand pipe under the shelf

 

[Mavors]

Sadly we cannot get into the boiler itself and underneath the shelf all the tubing is behind tiles. This is very frustrating, What is it that the other valves do exactly?

 

[kevplumb]

heating flow and return isolaters large red and blue
gas yellow

cold water in small blue

 

[kevplumb]

try following the pipes there must be a means of filling it somewhere

 

[dannyd04]

im having the same problem with my heatline vizo. no pressure. there is a flexi hose looks like its connettin into the waste?? no valve on it anyway for sure leads right into the boiler. 4 valves (l-r) red yellow blue and blue how do i fix the pressure???