Microwave stops heating shortly after start and displays E02 on the control panel.
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
Safety Warning: Internal microwave repairs involve lethal voltages. Do not touch internal components unless you are trained and have discharged the high-voltage capacitor properly.
User-level checks:
- Unplug the microwave and let it sit for at least 10 minutes.
- Inspect the rear and side vents for dust, grease, or obstructions. Clean with a soft brush and vacuum.
- Ensure the microwave has adequate clearance on all sides per the Insignia installation manual (usually several inches around the unit).
- Verify that the cooling fan intake is not blocked by cabinets or objects.
Technician-level checks:
- Remove the outer cover and discharge the capacitor.
- Check the magnetron thermostat (thermal cutout) for continuity. Replace if open.
- Verify the cooling fan motor runs when the unit is started. Replace the fan motor if seized or not receiving power.
- Inspect the magnetron for burn marks, cracks, or arcing. Test per service manual and replace if defective.
If E02 returns after cleaning vents and ensuring proper airflow, professional service is recommended.