Microwave displays E14 and fan runs unexpectedly or not at all.

Safety: Unplug the microwave. Internal fans are near high-voltage components; avoid contact with those areas.

Steps:

• 1. Check vents: Ensure all external vents are clear of dust and obstructions. Clean with a vacuum and soft brush.
• 2. Listen for fan: During cooking, you should hear the main cooling fan. If silent or excessively loud, suspect a fan issue.
• 3. Access fan (advanced): Remove the cabinet and locate the main cooling fan (often near the magnetron or transformer). Inspect for debris or broken blades.
• 4. Electrical test: Check the fan motor connector and wiring. Test the motor for continuity. A completely open winding indicates a failed motor.

Repair: Replace the cooling fan motor with a Sharp-compatible unit if defective. If the motor is good but not receiving power, the control board fan driver may be faulty and require professional replacement.