Boiler issue

[Diytry1]

Hi
I have a camray oil boiler and it runs for 30 minutes then the lock out light comes on! When I try to reset it won’t fire back up but if I leave it for several hours it will then fire up but locks out again after 30 minutes!
I have had a new nozzle and a coil fitted but is still locking out!
Any idea what it could be?
Thanks

 

[Terrywookfit]

Does it lock out out during a run cycle or ignition sequence

 

[Diytry1]

It will fire up the first time but one it cuts out and goes to restart it then tries to ignite and locks out! You can hear it sparking trying to ignite but locks out and you can smell heating oil

 

[Terrywookfit]

Is the fuel line restricted by a blocked filter, Does the burner oil pump become noisy ( screaming) just before lockout,
You are not giving much information....A video would help!!

 

[Diytry1]

here’s a video

 

[Terrywookfit]

I see no video

 

[Diytry1]

Oh sorry it wouldn’t let me upload it! We had a new pump fitted on Friday! Worked fine all evening last night and this morning! Now the lock out light has come on again!