Display shows E3 and the ambient temperature reading is incorrect or fluctuates wildly; cooling performance may be erratic.

Safety: Unplug the wine cooler before accessing any components. Do not bypass safety devices.

• Identify the ambient sensor: On many Teka wine coolers, the ambient sensor is located near the front grille, behind the control panel, or in the rear compartment where it can sense room temperature.
• Inspect placement: Ensure the sensor is not touching hot components (like the compressor discharge line) and is not blocked by insulation or debris.
• Check wiring and connector: Look for frayed wires or loose connectors between the sensor and the main control PCB. Clean any oxidation on terminals and reseat connectors firmly.
• Measure resistance: With a multimeter, check the sensor resistance at room temperature. Compare to typical NTC values (often 5–10 kΩ at 25°C). If the reading is open, shorted, or far out of range, replace the ambient NTC sensor.
• Replace sensor: Install a Teka-compatible ambient sensor, routing the cable away from hot or moving parts. Secure it in a location where it can sense room air, not internal cabinet air.
• Control board check: If the sensor is good and correctly installed but E3 remains, the main control PCB may misread the sensor and should be evaluated or replaced by a technician.