got the pcb changed and new ignition coil still locking out and not lighting or fireing up

dalton 02, January 2009

Mine is doing the same. Boiler lights for 2 minutes then locks out, press re-start button but it doesnt re-ignite. Only getting 2 minutes of heat. Fan, pump working. Engineer has changed pcb and still have same problem and he is now saying he doesnt have a clue what is wrong with it

laura, January 2011