Digital display shows E1 and cabinet is not cooling or cooling poorly.

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

Steps to check and replace the cabinet temperature sensor (NTC):

• 1. Power reset: Unplug the unit for 5 minutes, then plug it back in. If E1 returns immediately, proceed with diagnosis.
• 2. Locate the cabinet sensor: On most Brandt wine coolers, the cabinet NTC is clipped to the evaporator cover or mounted on the rear interior wall behind a small plastic cover. Remove interior shelves and the rear plastic panel if necessary.
• 3. Inspect wiring: Check the sensor leads and connector going to the main PCB (usually behind the rear metal service panel). Look for broken wires, corrosion, or loose connectors. Reseat the connector firmly.
• 4. Test the sensor: With a multimeter set to resistance (kΩ), measure the NTC across its two leads at room temperature (around 20–25°C). A typical Brandt NTC will read between 5–20 kΩ. If it reads open (OL) or near 0 Ω, the sensor is defective.
• 5. Replace the sensor: If readings are out of range, order a compatible Brandt cabinet NTC sensor. Disconnect the old sensor, route the new sensor along the same path, secure it with clips or tape, and reconnect to the PCB.
• 6. Reassemble and test: Refit the interior panel and shelves, restore power, and monitor the display. The E1 code should clear automatically after a short period if the fault is resolved.
• 7. If E1 persists: With a known-good sensor installed, a persistent E1 usually indicates a faulty main control board. At this point, replacement of the PCB or professional service is recommended.