On Feb 17, 10:44*pm, padrigue
wrote:
responding tohttp://www.homeownershub.com/maintenance/ge-spacemaker-microwave-vent...padrigue wrote:

Ping... anybody have any ideas or suggestions?

If it were me, unless I could see exactly how it's connected,
vented to the outside, etc, I would take it down. They are
only held by a few screws. I wouldn't be surprised to find
that it's not really connected properly to the outside vent.
I'd compare what I see to what the manual shows.