Microwave shows E8; fan may run briefly and then stop; unit will not heat.

Safety first: Unplug the microwave before any disassembly.

Step-by-step checks:

• 1. Check external airflow: Ensure that the intake and exhaust vents are not blocked by cabinets, walls, or objects. Clean any dust or grease from the vent grilles.
• 2. Listen for fan operation: Start a short cook cycle and listen. If you do not hear the internal cooling fan running (distinct from the turntable motor), the fan may be faulty.
• 3. Access fan (experienced DIYers): Remove the outer cabinet. Locate the cooling fan assembly, usually near the magnetron and transformer.
• 4. Inspect fan blades: Check for heavy grease buildup, foreign objects, or bent blades preventing rotation. Clean carefully with a degreaser and cloth.
• 5. Test fan motor: Spin the fan by hand (with power disconnected). It should rotate freely. If stiff or seized, the motor is likely bad. Check the motor's wiring connector for secure fit and no burn marks.
• 6. Replace fan motor if needed: Remove mounting screws, disconnect wiring, and install a new OEM Midea cooling fan motor. Ensure correct orientation and secure mounting.
• 7. Reassemble and test: Refit the cabinet, plug in, and run a short cycle to confirm the fan runs and E8 is cleared.