Microwave interior light, fan, and turntable run with door open, or unit attempts to start when door is closed lightly.
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.
Possible Causes
How to Fix / Troubleshooting
Critical safety warning: A microwave that runs with the door open is extremely dangerous. Unplug it immediately and do not use until repaired.
Step-by-step checks (for experienced DIYers):
- 1. Inspect door and hinges: Check for sagging door, loose hinges, or damaged latch hooks.
- 2. Access door switches: Remove the cabinet and locate the interlock switches. Check that they move freely and are correctly actuated by the latch.
- 3. Test switches: Use a multimeter to verify that switches open and close correctly. Replace any switch with welded or inconsistent contacts.
- 4. Adjust latch bracket: Realign or tighten the bracket so that all switches change state only when the door is fully closed.
Recommendation: If you are not confident, have a professional repair the door safety system.
Repair Difficulty
Required Part
We may earn a commission from links on this page.