Boulter Camray oil boiler cuts out but starts if front cover removed - Any ideas?

[lodgey47]

As title when my Camray starts up it runs for a few seconds then stops. A few more seconds later it starts again then stops again...... and so on. What I've found is if I partly remove the front air tight cover it runs fine with no problems. It was serviced over the summer but can't get the engineer back now until after christmas. The fan is quite, oil pump seems ok, flue isn't blocked, plenty of oil. Any ideas?? Cheers

 

[dontknowitall]

If it has a balanced flue this might be blocked.

 

[kimbo]

It sounds like burner is being starved of oxygen, it either needs the air increasing on the adjuster, best done with a flue gas analyzer. Or its recycling its own flue gases because the flue seals have gone

 

[Roger Welton]

Could also be the combustion chamber access door joint leaking, has it been off recently.