Wine cooler display shows E3 and interior light and controls may still work but compressor does not run correctly.

Safety: Unplug the unit before removing the control panel or display trim.

Steps to address E3:

• Check installation conditions: Ensure the wine cooler is not installed in an area outside its specified ambient temperature range (e.g., not in a garage below 10°C or above 32°C). Extreme ambient conditions can trigger sensor-related faults.
• Access the control panel: Remove the front trim or control panel cover (usually clipped or screwed). Locate the small ambient sensor near the display or air intake.
• Inspect sensor and wiring: Look for broken wires, loose connectors, or signs of moisture. Reseat the connector firmly.
• Clean dust and debris: Use a soft brush or compressed air to remove dust from the sensor area, which can affect readings.
• Test sensor: With power off, disconnect and measure resistance. Replace the ambient NTC sensor if readings are out of range.
• Replace control PCB if needed: If a known-good sensor does not clear E3, the display/control PCB may be faulty and should be replaced with a Neff-specific part.