Display shows E3 and the ambient temperature reading is incorrect or dashes are shown; cooling performance may be erratic.

Safety: Unplug the wine cooler before removing the toe-kick or rear panel. Avoid pulling on wires directly.

The ambient sensor allows De Dietrich wine coolers to adjust operation based on room temperature.

• Locate the sensor: It is often mounted behind the front grille or near the air intake at the bottom or rear of the unit.
• Visual inspection: Remove the grille or panel and look for a small probe or plastic-encased sensor on a two-wire harness. Check for dust buildup, corrosion, or physical damage.
• Check connections: Trace the harness back to the main control board and ensure the plug is fully seated and not oxidized.
• Test resistance: With the sensor unplugged, measure resistance at room temperature. Compare to typical NTC values (5–20 kΩ at ~25°C). If readings are far off or unstable when you move the cable, the sensor is faulty.
• Replace sensor: Install a new ambient NTC sensor of the correct specification. Secure it in the same location, away from direct heat sources or compressor exhaust.
• Re-test: Restore power, clear the error by turning the unit off and on, and verify that the displayed ambient temperature is reasonable and that the cooler cycles normally.