Freezer shows E3; compressor may not start or may short-cycle

Safety first: Unplug the freezer before accessing the control compartment or wiring. Avoid pulling on wires directly.

Steps to troubleshoot E3:

• Locate ambient sensor: On many Midea freezers, the ambient sensor is near the front grille, control panel, or air intake, often behind a small vented cover.
• Inspect sensor and wiring: Remove the cover and check the sensor body and wires for damage or discoloration. Ensure the connector is firmly attached.
• Measure resistance: Disconnect the sensor and measure its resistance at room temperature. Compare to typical NTC values (around 5–10 kΩ at 25°C). If the reading is extremely high (open) or near zero (short), the sensor is defective.
• Replace sensor if needed: Install a new Midea ambient NTC sensor, routing the wires along the original path. Secure with clips or tape to prevent chafing.
• Check control board connection: If the sensor tests good, access the main control board (usually at the rear). Reseat the ambient sensor connector and inspect for corrosion or burnt traces.

When to seek service: If E3 remains after sensor replacement and connector checks, the main control board likely needs replacement and should be handled by a professional.