Baxi solo 2 of 80 boiler

[Rob Jones]

Guys, hopefully someone can help and point me in the right direction.
I have a baxi solo boiler that will not light cold, i can get it to light by just pulling at the combustion cover, once lit the boiler runs fine.
i have checked and replaced the following,
fan
checked and confirmed ignition spark is working
gas flow fine
pcb, replaced last year

i did suspect the air pressure sensor but cannot see why the boiler would run fine if I just crack the seal for a few seconds

all help appreciated

rob

 

[Billy Bob Bob]

get a gas safe engineer in are you mad?the risks you bloody diyers take to save a few quid you would never forgive yourself if you killed a family member