Microwave shows E5 and will not heat, fan may run briefly then stop

Critical safety warning: High-voltage components inside a microwave (inverter, transformer, capacitor, magnetron) can deliver lethal shocks even when unplugged. Do not attempt HV repairs unless you are trained and equipped.

• 1. Basic reset: Unplug the microwave for 10 minutes, then plug back in and test. If E5 reappears immediately when starting a cook cycle, a hardware fault is likely.
• 2. Check for burning smell or unusual noise: If you noticed a loud hum, crackling, or burning smell before E5 appeared, discontinue use. This strongly suggests a failing magnetron or inverter.
• 3. External inspection only: Verify that the mains plug and socket are not damaged or overheated. Do not open the cabinet if you are not qualified.
• 4. Professional repair: E5 typically indicates a failure of the high-voltage inverter or magnetron in Russell Hobbs inverter-type microwaves. These parts require specialized handling and calibration. Contact an authorized service center for diagnosis and replacement.