Wine cooler displays E2 and runs continuously or not at all, temperature unstable

Safety warning: Disconnect power before accessing internal components. Evaporator area may have sharp metal fins; wear cut-resistant gloves.

• Locate the evaporator sensor: Remove interior shelves and the rear inner panel of the wine compartment (usually held by screws). Behind this panel is the evaporator coil and a small sensor clipped to the coil or nearby tubing.
• Inspect for ice and moisture: If the evaporator is heavily iced, allow it to fully defrost (door open, unit unplugged) for several hours. Excess ice can damage or dislodge the sensor.
• Check wiring and connector: Look for brittle, cracked, or corroded wires leading from the sensor to the cabinet wall. Ensure the connector is tight and free of corrosion.
• Test the thermistor: Disconnect the sensor and measure resistance with a multimeter. Compare to Amana specifications at a known temperature (e.g., place the sensor in a cup of ice water and check for the specified resistance). Replace if readings are out of range or unstable.
• Replace the evaporator thermistor: Unclip the old sensor from the evaporator, install the new one in the same location, and route the wiring along the original path, avoiding contact with sharp fins.
• Reassemble and test: Reinstall the inner panel, restore power, and monitor operation. If E2 returns with a new sensor and good wiring, the main control board may need replacement by a professional.