Over-the-range Viking microwave does not vent properly; steam and smoke are not being removed from the cooktop area.

Safety: Turn off power before removing the top grille or accessing the vent system.

• Verify vent mode: Check whether your Viking microwave is installed for external venting or recirculating. Ensure the blower is oriented correctly per the installation manual.
• Inspect damper: Check the vent damper flap at the top or rear for free movement. Remove any obstructions.
• Clean or replace filters: Clean grease filters regularly. If using recirculating mode, replace the charcoal filter as recommended by Viking.
• Check ductwork: Inspect external ducting for kinks, blockages, or bird nests. Clear any obstructions.