Error E04 displayed; defrost cycle does not complete properly, frost accumulates on evaporator and rear panel.

Safety first: Unplug the refrigerator before accessing the evaporator area. Use caution around sharp metal fins and electrical connectors.

Step 1 – Manually defrost:

• Remove food from the affected compartment and store safely.
• Leave doors open and allow the unit to defrost fully for 12–24 hours with towels to collect water.

Step 2 – Access defrost components:

• Remove the rear interior panel to expose the evaporator, defrost heater, and defrost sensor/thermostat.
• Locate the defrost thermostat (a small round or oval device clipped to the evaporator) or defrost NTC sensor.

Step 3 – Test the sensor/thermostat:

• With the evaporator cold (below freezing), measure continuity of a thermostat or resistance of an NTC sensor.
• A defrost thermostat should show continuity when cold; an NTC should match the specified resistance range.
• Replace the component if readings are incorrect.

Step 4 – Reassemble and monitor:

• Reinstall panels, restore power, and clear E04 if necessary.
• Monitor for several days; if frost returns and E04 reappears, the control board's defrost control may be faulty and require professional replacement.