The Microwave Vent Damper attaches to the outer cabinet of the appliance and directs the flow of air through the vent's duct. This part is designed to be used with select major brand microwaves; check to see if your model number is compatible. Replacing this part will require basic hand tools, some disassembly of the microwave and novice repair experience. You must unplug the appliance or shut off the house circuit breaker for the appliance before installing this part.