Boiler only ignites when front cover is removed

[Greg47]

Hi, I have a Halstead Ace High, it will only start up when the front cover is removed or partially off.
A typical symptom of the air pressure switch at fault I am informed which is logical, this has been replaced as has the pcb for a different fault,
Anyone experienced this problem before



<Moderator's note:>
This site does not support DIY gas and posts giving advice on gas work, or encouraging or suggesting it, may be deleted.

 

[oldbuffer]

Turn it off. Do not use until checked and given the all clear by a gas safe registered engineer. The symptoms you describe suggest insufficient oxygen for complete combustion (hence no flame and boiler doesn't start). Insufficient oxygen = incomplete combustion = too much Carbon Monoxide = death.

 

[flameport]

Anyone experienced this problem before

No one has, because normal people do not partially dismantle their boiler and then turn it on.