Microwave stops heating shortly after start and displays E02.

Safety first: Unplug the microwave before inspection. Do not remove the cabinet unless you are trained; the high-voltage section can retain a dangerous charge.

Steps to improve cooling and clear E02:

• 1. Check installation clearance: Ensure there is adequate space around the Toshiba microwave per the user manual (typically several centimeters on sides, top, and rear). Move the unit away from walls or cabinets if airflow is restricted.
• 2. Inspect air vents: Examine the side, rear, and top vents for dust, grease, or plastic wrap blocking airflow. Clean vents gently with a soft brush or vacuum.
• 3. Verify fan sound: During normal operation (before the error appears), listen for the internal cooling fan. If you do not hear a steady fan noise, the fan motor may be failing.
• 4. Allow cool-down: Leave the microwave unplugged for 30–60 minutes to let the magnetron and thermal cut-out reset. Plug back in and test with a cup of water for 1–2 minutes.
• 5. If E02 returns quickly: The magnetron, thermal cut-out, or fan motor may be defective. These parts are in the high-voltage section and should only be replaced by a qualified technician.

Do not bypass safety devices: Never bypass thermal cut-outs or thermostats; they prevent fire and overheating.