E9
LG Door Latch or Interlock Switch Error

Microwave shows E9 and will not start; may be accompanied by a door open/close chime.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Broken door latch hook, Misaligned door, Failed door interlock switch, Loose switch bracket

How to Fix / Troubleshooting

Critical safety: Door interlocks prevent microwave radiation leakage. Never bypass them. Unplug the unit before inspection.

User checks:

  • Inspect door and latch: Look at the plastic latch hooks on the door for cracks or breakage. Ensure they extend fully when the door is closed.
  • Check for obstructions: Clean the latch area and door frame to remove food splatters or debris.
  • Test door closure: Close the door firmly but not forcefully. If the door feels loose or does not click, the latch or hinges may be worn.

If E9 remains, the internal door switches or latch bracket likely need adjustment or replacement by a qualified technician.

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Repair Difficulty

Professional Required 5/5

Required Part

Door Latch and Interlock Switch Assembly
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