Microwave stops heating shortly after start or will not start; display shows E2.

Safety first: Unplug the microwave. High-voltage components inside can be lethal. Do not discharge or handle the high-voltage capacitor unless you are trained.

Step-by-step checks:

• 1. Verify ventilation: Ensure the microwave has proper clearance on sides, top, and rear as specified in the Midea manual. Remove any items blocking the rear or top vents. Clean grease and dust from vent grilles.
• 2. Check for misuse: Confirm you are not running the microwave empty or with metal containers, which can cause overheating and sensor errors.
• 3. Access thermal devices (experienced DIYers): Remove the outer cabinet. Locate the cavity thermal fuse (usually clipped to the top or side of the cavity) and the magnetron thermostat (mounted on the magnetron body).
• 4. Test continuity: With wires removed, use a multimeter on continuity. Both the thermal fuse and magnetron thermostat should read closed (continuity) at room temperature. If either is open, it has tripped and must be replaced; do not bypass these safety devices.
• 5. Inspect airflow path: Check the cooling fan, air channels, and intake filters for obstructions. A failed fan motor or blocked duct can cause repeated E2 errors.
• 6. Replace faulty parts: Install OEM-rated thermal fuse or thermostat with the same temperature rating. Reattach securely to the original mounting location.
• 7. Reassemble and test: Refit the cabinet, plug in, and test with a cup of water. If E2 returns quickly, the control board or temperature sensing circuit may be defective and should be evaluated by a technician.