"RobertL" wrote in message
...


In case people are interested in what caused the rattling:

The guy from vokera came today and he found that the flue had come
apart up in the loft! This meant it was discharging flue gases into
the loft and also sucking the outlet gases back into the inlet in
again causing the flame to stutter (loudly) and go out.

He was rather critical of the original installation for not supporting
the flue sections, resulting in them gradually working loose and
separating.

Quite a dangerous fault really... I'm annoyed I didn't think of
checking up there before paying for Vokera to come and diagnose it for
me. Ah well.

Robert


What length of flue is in the loft? Anything where the flue is over one
metre needs to be braced (supported). How old is the system? And, is the
original installer coming back to get his wrists slapped for nearly killing
you and your family?

Glad you've got that one sorted.