Freezer displays E5 and may not cool or may short-cycle

Critical safety: Unplug the freezer. Work at the rear only if you are comfortable around mains wiring. Do not open the sealed refrigeration system.

Steps:

• 1. Listen for compressor behavior: After plugging in (for testing only), note if the compressor hums then clicks off, does not start at all, or starts briefly. Then unplug again before working.
• 2. Access compressor compartment: Remove the rear lower cover to expose the compressor, start device, and control module.
• 3. Inspect start device: On non-inverter AEG freezers, a PTC start relay and overload protector are mounted on the compressor terminals. Check for burn marks, rattling pieces inside the relay, or melted plastic.
• 4. Test start relay/PTC: Disconnect and measure resistance according to specifications (usually low ohms). Replace if open, cracked, or obviously burnt.
• 5. Inverter models: If your AEG freezer uses an inverter compressor, inspect the inverter board for bulged capacitors or burnt components. Ensure all plugs are fully seated.
• 6. Wiring check: Verify tight connections on compressor terminals and ground. Repair any overheated or loose spade connectors.
• 7. Replace faulty module: If the start device or inverter board is suspect, replace with the correct AEG part number.

Important: If the compressor is mechanically locked or drawing excessive current, it may need replacement, which requires a refrigeration engineer with proper tools and certification.