Freezer displays E3 and may not defrost properly; heavy ice buildup on evaporator or irregular temperature swings.

Safety: Unplug the freezer before removing internal panels or working near the evaporator.

• Access the evaporator: Remove baskets and internal rear panel inside the freezer compartment. Use care not to damage the liner.
• Locate the defrost NTC: It is usually clipped directly to the evaporator tubing or embedded in a small aluminum sleeve attached to the coil.
• Check sensor placement: Ensure the sensor is firmly attached to the evaporator. A loose sensor can cause incorrect readings and trigger E3.
• Inspect wiring: Look for brittle insulation, ice damage, or pulled connectors where the sensor harness exits the liner.
• Measure resistance: Disconnect the sensor and test with a multimeter. Compare to expected NTC values at the current temperature (often a few kΩ at freezer temperatures). Replace if open, shorted, or inconsistent.
• Replace the sensor if faulty: Unclip the old sensor, install the new one in the same position, and secure it tightly to the evaporator tube for good thermal contact.
• Check harness continuity: If the sensor is good, test the harness back to the PCB. Repair or replace damaged wiring.
• PCB check: If sensor and wiring are confirmed good, the main PCB may be defective and require replacement.

Test: Reassemble the rear panel, restore power, and allow a full defrost cycle to run. Confirm that E3 does not reappear and that frost buildup is reduced over several days.