This is an exhaust damper assembly for a microwave, which is also known as a microwave vent damper. The damper directs air flow through the vent duct from the top or rear of your microwave, depending on your model, to allow the air to flow outside and prevent outside air from coming in. You will need to uninstall your microwave from the wall to access the exhaust damper. Once you have gained access to the damper, simply slide the old part out, and slide the replacement part in. This is an OEM replacement part that is sourced directly from the genuine manufacturer.
Installation Instructions
Mark from Morrisville, NC says,
Wanted to switch mv from recirc vent to venting outside
The mv was originally installed as recirc venting as there was no outside vent. I hated the steam and smoke just being put back into the kitchen.
I removed mv unit, ran a vent thru cabinet...read more