Microwave displays F5 and will not start; may occur immediately when pressing Start.

Safety first: Unplug the microwave. Door interlock circuits are a critical safety system; improper repair can result in microwave leakage. If unsure, contact a qualified technician.

• Check door closure: Ensure the door closes fully and evenly. Look for sagging hinges or damaged latch hooks on the door.
• Listen for clicks: Slowly open and close the door while listening for distinct clicks from the interlock switches. Missing or weak clicks can indicate a faulty or misaligned switch.
• Access door switches: Remove the top grille and control panel to access the interlock switch assembly on the latch side. On some models, you may need to remove an additional cover.
• Inspect switches and bracket: Check for cracked plastic brackets, loose mounting screws, or burned switch terminals. Tighten or replace as needed.
• Test switches: With a multimeter, test each door switch for proper continuity in open and closed positions according to the wiring diagram. Replace any switch that does not change state correctly.
• Reassemble and test: After replacing switches or adjusting the latch, reassemble the unit and test for proper operation. Verify that F5 is cleared and that the oven only runs with the door fully closed.