Freezer shows E5; compressor may not start or may short-cycle; interior remains warm.

Safety first: Unplug the freezer. The compressor area contains live mains connections; do not work on it with power applied.

Step-by-step checks:

• 1. Listen for compressor behavior: After plugging in (for diagnosis only), you may hear a click and brief hum followed by another click. This suggests the start device or overload is tripping. Unplug again before proceeding.
• 2. Access compressor compartment: Remove the rear lower service panel to expose the compressor, start relay/PTC, and overload protector.
• 3. Inspect start device: Remove the plastic cover on the compressor terminals. Check the start relay/PTC and overload for signs of burning, cracking, or melting.
• 4. Test start relay/PTC: With a multimeter, check for continuity according to the relay type. Many PTC devices will show low resistance at room temperature. Replace if open, shorted, or physically damaged.
• 5. Test overload protector: Check continuity through the overload device. If open at room temperature, it is likely faulty and should be replaced.
• 6. Evaluate compressor: If new start components do not resolve E5 and the compressor still fails to run or draws very high current, the compressor itself may be mechanically seized or internally shorted.

When to call a technician: Compressor replacement and sealed system work require specialized tools and must be done by a certified refrigeration technician. Do not attempt sealed system repairs yourself.