Display shows E3 and the unit may not respond correctly to user temperature settings.

Safety first: Unplug the wine cooler before removing the control panel or display assembly.

• Check installation environment: Ensure the cooler is not installed in direct sunlight, near ovens, or in extremely hot or cold rooms, as this can confuse ambient sensing. However, an E3 code usually indicates an electrical fault.
• Access the control panel: Remove the screws securing the top/front control panel or door trim (depending on model). Carefully pull the panel forward to expose the display PCB and wiring.
• Locate the ambient sensor: On many Phiestina models, the ambient sensor is a small probe or thermistor mounted near the control board or behind a small vent in the front panel, with two thin wires leading to the board.
• Inspect connections: Verify the sensor plug is fully seated on the display or main board. Look for corrosion, bent pins, or broken wires at the connector.
• Visual sensor check: If the sensor capsule is cracked, swollen, or corroded, it should be replaced.
• Replace sensor if needed: Order a compatible "Phiestina ambient temperature sensor". Disconnect the old sensor, route the new sensor along the same path, and secure it in the original mounting location so it can sense room air.
• Reassemble and test: Reinstall the control panel, ensuring no wires are pinched. Plug the unit back in and confirm that the E3 code is cleared and that temperature settings respond normally.