Display shows E3 and the temperature setpoint cannot be maintained; unit may short-cycle or run continuously.

Safety: Unplug the wine cooler before removing the control panel or top cover.

Steps:

• 1. Locate ambient sensor: On many La Sommeliere models, the ambient NTC is located near the front control panel or behind a small grille at the top/front of the cabinet to sense room temperature.
• 2. Remove control panel bezel: Carefully pry off or unscrew the front control panel (depending on model). Avoid damaging the ribbon cable to the display.
• 3. Inspect sensor and wiring: Find the small probe or thermistor on a two-wire lead. Check for broken leads, corrosion, or a loose connector on the PCB. Reseat the connector.
• 4. Test resistance: Measure the sensor resistance at room temperature and compare to the expected NTC value (often 5k–10kΩ at 25°C). Replace if open or shorted.
• 5. Replace sensor: If defective, install a new La Sommeliere ambient NTC sensor. Route the wires away from sharp edges and hot components.
• 6. Reassemble: Refit the control panel, ensuring no wires are pinched. Restore power and verify that E3 clears and that the displayed temperature is stable.

Tip: If the cooler is installed in a very hot or very cold environment, relocate it to within the manufacturer’s specified ambient temperature range, as extreme conditions can also trigger sensor-related errors.