Safety: Unplug the wine cooler before servicing.

Identify zone: On dual-zone GE wine coolers, E1 typically refers to the upper compartment sensor. Confirm in your user manual if available.
Remove shelves and panel: Take out upper zone shelves and remove the rear or side interior panel to expose the thermistor clipped to the liner or evaporator cover.
Check wiring: Inspect the thermistor harness for cuts, pinches, or discoloration. Ensure the connector is fully seated on the harness and not corroded.
Test sensor: Disconnect the thermistor and measure resistance with a multimeter at room temperature. Compare to GE specifications. Replace the thermistor if readings are open, shorted, or significantly off.
Control board check: If the thermistor is good, access the main control board and verify the sensor harness is firmly connected. If the board shows burn marks or the code persists with a new sensor, replace the control board.

Restore power and verify that the E1 code clears and the upper zone maintains set temperature.

Display shows E1 and the wine cooler temperature is inaccurate or fluctuates.

Possible Causes