Digital display shows E1 and cabinet temperature is not cooling correctly or fluctuates widely.

Safety first: Unplug the Blastcool wine cooler from the mains before removing any panels. Do not work on live circuits.

• Power reset: Disconnect power for 5–10 minutes, then reconnect and check if E1 clears. Temporary glitches can sometimes be reset.
• Locate the cabinet sensor: Inside the wine compartment, look for a small plastic probe or sensor cover on the rear or side wall. On many Blastcool models, the cabinet NTC is clipped behind a small grill.
• Inspect the sensor and wiring: Remove the interior cover (usually a few Phillips screws). Check that the sensor is firmly clipped in place and that its cable is not pinched, cut, or wet from condensation.
• Check connections at the PCB: Access the control board (typically behind the lower rear service panel). Verify the sensor plug is fully seated on the main PCB and that there is no corrosion or burnt marks on the connector.
• Test the sensor (for advanced DIYers): With the unit unplugged, disconnect the sensor and measure its resistance with a multimeter. Compare to an NTC chart (commonly ~5–10 kΩ at 25°C, but check Blastcool documentation). If the reading is open, shorted, or far off spec, the sensor is faulty.
• Replace the sensor: If defective, order a compatible Blastcool cabinet NTC temperature sensor. Route the new sensor along the original path, avoiding sharp bends and hot components. Reconnect to the PCB and reassemble panels.
• Test operation: Restore power, clear the error (if the model allows), and monitor temperature stability for several hours.

If E1 persists after sensor replacement, the main control PCB may be misreading the signal and should be evaluated by a qualified technician.