Display shows E3 and the unit may not defrost properly, with ice buildup on the evaporator.

Safety first: Unplug the refrigerator and wear cut-resistant gloves when working around metal panels and sharp evaporator fins.

Access the evaporator:

• Empty the freezer section and remove shelves and drawers.
• Remove the rear interior panel to expose the evaporator coil and attached sensor.

Check the defrost sensor:

• Locate the small thermistor clipped to the evaporator tubing or mounted near the coil.
• Inspect for broken wires, corrosion, or a sensor that has come loose from the coil.
• With power disconnected, unplug the sensor and test resistance with a multimeter. An open or shorted reading indicates a bad sensor.

Reconnect and test: Reattach or replace the sensor as needed, ensuring it is firmly clipped to the evaporator tubing. Reassemble panels, restore power, and monitor for code clearance and proper defrosting.

Note: If the sensor tests good but E3 persists, the main control board may not be reading the sensor correctly and may require replacement.