Wine cooler shows E3, temperature display may flash, unit may shut down cooling intermittently

Safety: Disconnect mains power before accessing the control area or top/bottom panels.

• Identify sensor location: On many Montpellier wine coolers, the ambient sensor is located near the front grille or rear air intake, often behind a small vented cover.
• Visual inspection: Remove the grille or small cover and inspect the sensor capsule and wiring. Ensure it is not dangling into the compressor compartment or touching hot components.
• Check wiring continuity: With the unit unplugged, disconnect the sensor from the PCB and test continuity and resistance. An infinite or zero reading indicates a failed sensor.
• Reposition sensor: If the sensor is working but placed incorrectly (e.g., touching condenser coil), reposition it so it measures true room air, not hot discharge air.
• Replace sensor if needed: Install a new Montpellier ambient NTC sensor, matching connector type. Secure it in the original mounting point.
• PCB evaluation: If a new sensor does not clear E3, the main control board may be misreading the sensor and should be tested or replaced by a technician.