Microwave displays F9 and will not start or may shut off during operation.

Safety: Unplug the microwave. Door switch circuits are near high-voltage components; do not touch the capacitor or magnetron.

• Check door closure: Ensure the door closes fully and evenly. Look for sagging hinges or obstructions on the door frame.
• Listen for clicks: Slowly open and close the door; you should hear distinct clicks from the interlock switches. Missing or weak clicks may indicate a bad switch or latch.
• Inspect latch and hooks: Examine the plastic door hooks and latch assembly for cracks or wear. Replace if damaged.
• Test door switches: Remove the control panel and access the door switch bracket. With power disconnected, use a multimeter to test each switch for proper continuity in open and closed positions according to the Monogram wiring diagram.
• Replace faulty parts: Replace any defective door interlock switch and/or door latch assembly. Ensure the switch bracket is properly aligned so the door actuates all switches correctly.

Warning: Incorrect door switch repair can lead to microwave leakage or unsafe operation. If unsure, contact a qualified technician.