WORCESTER 240 Not lighting up

[Louis121]

I wonder if you could help with a problem I have with my combi Boiler.
The make and Model is a WORCESTER 240. The problem seems to center around the burners! whan I turn the Heating on the burners will turn on to High Fire eventually but just for a short period of time then go out and start clicking tries to light up but the burners don't come on. but the pump still works. The similar symptoms happen when turning on the Domestic Hot Water,it wouldn't light at all, no matter how much I swore at it. I don't think it is the thermostats as they are separate.
Any help or advice would be appreciated.

Thanks in advance

 

[Louis121]

HAPPY DAYS!
It took me the whole day but is finally sorted, only thanks to the hints I've picked up in this forum. Couldn't have done it without it.
Everybody, keep up the good work!
And by the way, for those who'll find themselves in the same pickle - it was the fan that got stuck, just needed a bit of cleaning and greasing in my case.......