Display shows E3; temperature display may be blank or inaccurate; unit may not respond correctly to setpoint changes.

Safety: Always unplug the wine cooler before removing covers or handling wiring.

Steps to resolve E3:

• Confirm the code: Verify that E3 appears consistently and not just during power-up. Attempt a power reset by unplugging for 5–10 minutes.
• Locate the ambient sensor: On many NewAir wine coolers, the ambient sensor is mounted near the front grille, side wall, or behind a small vent opening to sense room temperature.
• Inspect the sensor and harness: Look for physical damage, crushed wires, or signs of moisture intrusion. Ensure the sensor is not dangling loose or pulled away from its mounting point.
• Access the control board: Remove the rear or bottom service panel to reach the main control board. Identify the connector for the ambient sensor (refer to wiring labels or color codes if available).
• Check connections: With power disconnected, unplug and re-seat the ambient sensor connector several times to clean the contacts. Inspect for corrosion or bent pins.
• Test the sensor: Disconnect the sensor and measure its resistance with a multimeter at room temperature. Compare to NewAir’s specified resistance curve. A reading of infinite (open) or near zero ohms indicates a failed sensor.
• Replace if defective: Install a new NewAir ambient temperature sensor / thermistor. Mount it in the same location and orientation as the original so it can accurately sense room temperature.
• Reassemble and test: Reinstall panels, plug the unit back in, and verify that the E3 code clears and the temperature display behaves normally.

Tip: Avoid placing the cooler in direct sunlight or near heat sources, as extreme ambient conditions can stress sensors and electronics.