Wine cooler display shows E1 and cabinet is not cooling or cooling erratically.

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

• Power reset: Unplug the unit for 5 minutes, then plug back in to see if E1 clears. If it returns, continue.
• Locate the cabinet sensor: On most Summit wine coolers, the cabinet NTC sensor is behind an interior plastic cover on the rear wall or side wall, usually near the middle shelves.
• Inspect the sensor and wiring: Remove the interior cover (usually Phillips screws). Check that the small probe sensor is firmly seated and that its wires are not pinched, cut, or corroded.
• Check connections at the control board: Access the control board (typically behind the rear service panel or under the top control housing). Find the connector labeled for the cabinet sensor (often a 2‑wire plug). Reseat the connector and look for corrosion or burnt marks.
• Test the sensor: With a multimeter set to resistance (ohms), disconnect the sensor and measure across its two leads. At room temperature (around 77°F / 25°C), most Summit NTC sensors read roughly 5k–10kΩ. If the reading is open (OL) or shorted (near 0Ω), replace the sensor.
• Replace the sensor if faulty: Order a compatible Summit cabinet temperature sensor (NTC) using your model number. Route the new sensor along the original path, avoiding sharp bends, and reinstall the interior cover.
• If sensor tests good: The fault may be in the main control board’s sensor circuit. Inspect the board for burnt components. If damaged or if E1 persists with a known-good sensor, replace the main control board.