Display shows E3 and the cabinet temperature fluctuates widely or the compressor runs erratically.

Safety first: Disconnect power before accessing the rear compartment.

Steps to diagnose and fix:

• Locate the ambient sensor: On many BODEGA wine coolers, the ambient sensor is located near the air intake at the rear or bottom of the unit, often clipped to the condenser or frame.
• Inspect the sensor: Look for a small probe with two wires. Check for cracks in the probe, frayed insulation, or signs of overheating.
• Check wiring and connector: Follow the sensor wire to the main control board. Ensure the connector is fully seated and free of corrosion. Reseat the connector.
• Test resistance: With the sensor disconnected, measure its resistance at room temperature. Compare to the expected NTC curve (commonly 5–10 kΩ at 25°C). Replace if open, shorted, or far out of range.
• Replace sensor if needed: Install a compatible BODEGA ambient NTC sensor. Secure it in the same location to ensure accurate ambient readings.

When to call a professional: If E3 persists after sensor replacement, the control board may misinterpret sensor data and require replacement by a technician.