Microwave displays E6 and beeps, no heating function available

Critical safety warning: Inverter-based microwaves use high-frequency high-voltage circuits that are extremely dangerous. Do not attempt to service the inverter or magnetron unless you are a qualified technician.

User-level actions:

• 1. Power reset: Unplug the microwave for at least 10 minutes to allow the inverter to discharge. Plug back in and test. If E6 reappears immediately, internal service is required.
• 2. Check ventilation and load: Ensure vents are not blocked and you are not running the microwave empty. Some Daewoo models may detect abnormal load and trigger inverter protection.

Technician-level actions (summary only):

• Inspect inverter board for burnt components or cracked solder joints.
• Test magnetron for shorts to ground.
• Verify control board signals to the inverter.

Recommendation: For E6, contact an authorized Daewoo service center. Inverter and magnetron replacement require specialized procedures and safety equipment.