Microwave fan runs but there is little or no airflow from the front or top vents (over-the-range models).

Safety first: Turn off power at the breaker before accessing the fan or ducting.

• Check filters: Remove and clean the grease filters with warm soapy water. Allow to dry completely before reinstalling.
• Inspect damper: Check the exhaust damper (flap) at the outlet of the microwave or on the exterior wall/roof. Ensure it moves freely and is not painted shut or blocked.
• Verify fan orientation: If the microwave was recently installed or reinstalled, confirm that the blower fan is oriented correctly for recirculating or vented operation as per Fisher & Paykel instructions.
• Check ducting: Inspect the duct for kinks, crushing, or obstructions. Clear any blockages.