E5 appears on the display; compressor may not start or may shut down quickly; freezer warms up.

Critical safety: Unplug the freezer. The compressor area contains live mains connections. If you are not comfortable working with mains voltage, contact a professional.

• Access compressor compartment: Remove the rear lower service panel to expose the compressor and control components.
• Inspect wiring and components: Check the start relay/PTC and overload protector mounted on the compressor terminals. Look for burn marks, melted plastic, or loose connections.
• Test start relay/PTC: Disconnect the relay and shake it gently; if it rattles excessively or shows signs of burning, it is likely faulty. Measure resistance according to the part specification if available.
• Check overload protector: Test for continuity across the overload device at room temperature. An open circuit indicates a failed protector.
• Compressor test (basic): With the unit unplugged and components removed, measure resistance between compressor terminals (C, S, R). Values should be finite and consistent with the compressor label. A short to ground (between any terminal and the compressor shell) indicates a failed compressor.
• Replace faulty parts: Replace the compressor start relay/PTC and/or overload protector if defective. If the compressor is shorted or locked, replacement of the compressor and refrigerant handling must be done by a certified refrigeration technician.