What to Check First
- Check the Microwave Door 1 Using a damp cloth, clean away any food stains or obstructions around the door. 2 Open and close the door 2-3 times to ensure the latch is engaging. 3 Retry starting the microwave. Note If the door is damaged or an error code appears on the display, service will be required. Request a repair with or 24/7 Chat Support .
- Check Other Buttons A chime sound should be heard when buttons are pressed on the microwave. If no sound is heard, or no changes are visible in the display, the control lock may be enabled. Disable the control lock and retry. How to lock/unlock Press and hold down the [ CLEAR/OFF ] button for 3 seconds. Note This function can vary depending on your model. Refer to the owner’s manual for instructions specific to your model.
- Reset the Unit This will reset the control panel and clear any communication issues with the control panel. 1 Unplug the unit or turn off the circuit breaker for 2-3 minutes. 2 Plug the unit back in and retry.
- If you microwave is not starting, it can be caused by the control lock being active, the door not being closed properly, or a problem with the control panel.
- 1 Using a damp cloth, clean away any food stains or obstructions around the door.
- 2 Open and close the door 2-3 times to ensure the latch is engaging.
- 3 Retry starting the microwave.
- If the door is damaged or an error code appears on the display, service will be required. Request a repair with or 24/7 Chat Support .
- A chime sound should be heard when buttons are pressed on the microwave. If no sound is heard, or no changes are visible in the display, the control lock may be enabled. Disable the control lock and retry.
- Press and hold down the [ CLEAR/OFF ] button for 3 seconds.
Why This Can Happen
Symptoms can have more than one cause, and the correct steps depend on the exact model, installation and operating conditions. Use the checks above to narrow the issue before service.
Safety and Model-Specific Guidance
Frequently Asked Questions
What should I check first for LG Microwave - Troubleshooting the Start Button Not Working?
Check the Microwave Door 1 Using a damp cloth, clean away any food stains or obstructions around the door. 2 Open and close the door 2-3 times to ensure the latch is engaging. 3 Retry starting the microwave. Note If the door is damaged or an error code appears on the display, service will be required. Request a repair with or 24/7 Chat Support .
When should I stop troubleshooting and contact LG?
Stop if the product shows signs of electrical damage, burning, leaking near electrical components, or if the recommended checks do not resolve the issue. Use LG USA support for model-specific service guidance.
Does this guidance apply to every LG model?
Not always. Controls, error codes and service steps can differ by model. Confirm the exact model number and follow the linked LG USA article for model-specific instructions.
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