Microwave shows E07 and stops; fan may run but no heating occurs.

Critical safety: Inverter-based microwaves operate at very high voltages and frequencies. Only qualified technicians should service the inverter or magnetron. Always unplug the unit before any inspection.

User-level actions:

• 1. Power cycle: Unplug the Blomberg microwave for 10 minutes, then plug back in and test. If E07 reappears immediately, internal service is required.
• 2. Avoid repeated restarts: Do not repeatedly attempt to start the microwave with E07 present, as this can further damage the inverter or magnetron.

Technician overview:

• 3. Inspect inverter board: Check for burned components, cracked solder joints, or blown fuses on the inverter module.
• 4. Test magnetron: Verify magnetron integrity before replacing the inverter, as a shorted magnetron can cause E07.

Due to the complexity and danger, E07 faults should be handled by an authorized Blomberg service provider.