Microwave stops during cooking and displays E04; may also trip the household breaker

Safety: Unplug the microwave immediately. Do not reset the breaker repeatedly as this can be a fire hazard.

• 1. Check the outlet and circuit: Plug a different small appliance into the same outlet to confirm the outlet and breaker are working correctly.
• 2. Visual inspection: Remove the outer cover (with the unit unplugged). Look for burnt smells, charred components, or melted insulation near the high-voltage transformer and capacitor.
• 3. Do not power the unit with the cover removed. This is unsafe and can expose you to microwave radiation.
• 4. If you see obvious damage in the high-voltage section: The usual repair is replacement of the shorted component (often the high-voltage diode or capacitor) and inspection of the magnetron and transformer. This work should be done by a qualified technician.
• 5. If no visible damage: The short may be internal to the magnetron or transformer. Professional diagnosis with proper test equipment is required.