Wine cooler shows E3 and the compressor and fan may not start; unit may stay off or run only briefly.

Safety: Disconnect the wine cooler from mains before removing the control panel or top trim.

• Locate ambient sensor: On many Balay wine coolers, the ambient NTC is located near the display/control panel or behind the front grille to sense room temperature.
• Remove control panel trim: Carefully pry off or unscrew the front control panel bezel. Avoid damaging the ribbon cable.
• Inspect sensor and wiring: Look for a small probe or thermistor attached near the panel. Check for loose plugs, corrosion, or broken wires. Reseat connectors.
• Measure resistance: With the unit unplugged, disconnect the sensor and measure resistance. Compare with expected NTC values (similar to cabinet sensor). Replace if open/shorted or clearly out of range.
• Replace sensor: Install a Balay-compatible ambient NTC, routing the cable as originally installed. Secure it away from hot components.
• Check control PCB: If the sensor is good, the display or main PCB may be faulty. Visual inspection for burnt components is possible, but replacement should be done by a technician.