Another reason why the sight glass may not be very visible is dirt.

The "sight glass" itself is simply a glass rod through the corner of
the fridge wall. It is oriented towards a tempered glass window in
the side of the combustion chamber. WIth ash on the inside, and dust
and such on the outside, it is entirely possible that the glass
window is dirty enough that you won't see any flames. Removal of the
fridge will allow you to clean this window also.

On May 5, 2005, at 8:30 AM, Mark Cumnock wrote:

> The blue LED looks cool, and lets me know whats going on, still
> never did
> see the sight glass ,