Microwave runs (light and fan on, turntable may rotate) but food remains cold; E03 or similar heating error appears.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Critical safety warning: The high-voltage section of a microwave (transformer, capacitor, diode, magnetron) can be lethal. The capacitor can hold a dangerous charge even when unplugged. If you are not specifically trained in microwave HV repair, do not attempt to service these parts yourself.
Basic user checks (safe):
- 1. Confirm correct operation: Place a large mug of water inside and run on full power for 2–3 minutes. If the water is still cold and E03 appears, heating is not occurring.
- 2. Check power level settings: Ensure the power level is set to 100% and not to a low level or defrost mode.
- 3. Inspect for obvious burning smell or noise: If you hear loud humming, buzzing, or smell burning, unplug immediately.
Technician-level checks (do not attempt unless qualified):
- Remove the cabinet and safely discharge the high-voltage capacitor using an appropriate resistor and insulated tools.
- Test the high-voltage diode for one-way conduction with a suitable meter.
- Test the high-voltage capacitor for capacitance and shorts.
- Check the magnetron for shorts to ground and visible damage (cracks, burn marks).
- Verify the high-voltage transformer primary and secondary windings for continuity.
Recommendation: For Privileg microwaves with E03 and no heat, replacement of the magnetron or other HV components should be carried out by a professional appliance technician. Consider the age and cost of the unit before proceeding.