Refrigerator shows E3 and may run continuously or not defrost properly, leading to frost buildup on the evaporator.

Safety first: Unplug the appliance. Be cautious of sharp metal edges inside the freezer.

Access the evaporator area:

• Empty the freezer compartment.
• Remove the rear interior panel (usually a few screws). If it is heavily iced, allow time to defrost before forcing it off.
• Locate the defrost/evaporator sensor clipped to the evaporator tubing.

Inspection:

• Check if the sensor has come loose from the coil; if so, reattach it firmly in its original position.
• Inspect the wiring for cuts, brittleness, or corrosion at connectors.
• Defrost any heavy ice buildup using warm air (hair dryer on low, kept moving and at a distance).

Sensor replacement:

• Disconnect the old sensor and install the new one, routing wires along the original path.
• Ensure the sensor is tightly clipped to the evaporator tube for accurate readings.

Reassemble and test: Refit the rear panel, restore power, and monitor for normal defrost cycles over the next 24 hours. If E3 persists, the main control board may not be processing sensor data correctly.