Emerson
No Start – Keypad or Door Interlock Issue
Microwave display works but START button does nothing; oven will not run.
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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
Defective START key on membrane keypad, Failed door switch not signaling closed, Misaligned door latch, Faulty control board input
How to Fix / Troubleshooting
Safety first: Unplug the microwave before panel or door work.
Simple checks:
- Ensure the door is fully closed and latched; push firmly on the door and try START again.
- Test other keys; if multiple keys fail, the keypad may be defective.
Door switch test:
- Access the door switches and test them with a multimeter for proper operation.
- Replace any switch that does not change state when the door opens/closes.
Keypad test: If only the START key fails and others work, the membrane keypad is likely worn and should be replaced.
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Repair Difficulty
Medium
3/5
Required Part
Membrane Keypad
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