Wine cooler not cooling properly; temperature rises above setpoint and display shows E1.

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

Steps to check and fix:

• 1. Power reset: Unplug the unit for 5 minutes, then plug it back in. If E1 returns after a few minutes, continue with diagnosis.
• 2. Locate the cabinet NTC sensor: The E1 code typically refers to the main compartment temperature sensor. On Vestfrost wine coolers it is usually clipped to the evaporator cover or mounted on the rear liner wall inside the cooled compartment, with two thin wires leading to the control board.
• 3. Inspect wiring and connector: Remove the inner back panel if necessary. Check the sensor wires for cuts, pinches, or rodent damage. Ensure the plug is firmly seated on the main control PCB. Clean any corrosion with electrical contact cleaner.
• 4. Test the sensor: With the unit unplugged, disconnect the NTC from the board and measure its resistance using a multimeter. At around 25°C (77°F), most Vestfrost NTCs read roughly 5–10 kΩ (check service documentation if available). If the reading is open (infinite) or shorted (near 0 Ω), the sensor is faulty.
• 5. Replace the NTC sensor: If defective, remove the old sensor from its clip or sleeve. Route the new Vestfrost-compatible NTC along the same path, avoiding sharp edges and hot components. Secure with original clips or cable ties and reconnect to the PCB.
• 6. Reassemble and test: Refit the inner panel, restore power, and set the desired temperature. Allow several hours for stabilization. The E1 code should clear automatically if the sensor is read correctly.
• 7. If E1 persists: With a known-good sensor installed, a persistent E1 may indicate a faulty main control PCB. At this point, professional diagnosis is recommended.