why wont my boiler stay lit?

when i light my boiler after 20 seconds it just cuts out completely....why?
Stephen Rowney, February 2005


done
first sergestion the problem usualy lies with the thermocouple
it may need repositioning (pointing into the piolt flame more)
may be sooted up (clean with some wire wool)
or it may need replaceing

ian
coxheadj@aol.com

ian, February 2005