"Rick Hughes" wrote in message
...


BTW, poor quality ignition leads can caus problems on some boilers.



That is a valid point, this fault only started 'after' I changed the
wiring harness (with 2 week delay) ... I'll also put the old ignition
lead back in as a try.
But unlikely if the reason for the lockout was "overheat"!
I'd go for the door seals or other various other gaskets/seals around the
combustion chamber.
Michael