Freezer shows E5, compressor may not start or may stop shortly after starting.

Safety: Unplug the freezer. Work only if you are comfortable around mains-voltage components. Do not open the sealed refrigerant system.

• 1. Access compressor compartment: Remove the lower rear service panel to expose the compressor and electrical box.
• 2. Listen and observe: After reconnecting power briefly (for diagnosis only), listen for clicking from the compressor area and note if the compressor hums then stops. Then unplug again.
• 3. Inspect start relay and overload: Remove the plastic cover on the compressor terminals. Check the PTC relay and overload protector for signs of burning, cracking, or melting.
• 4. Test relay and capacitor: With a multimeter, check the PTC relay for continuity according to its specification. Test the run capacitor (if fitted) with a capacitance meter; replace if out of tolerance or shorted.
• 5. Check compressor windings (advanced): Measure resistance between the three compressor pins (C, S, R). Look for open circuits or direct shorts to the compressor shell (ground). Abnormal readings indicate a failed compressor.
• 6. Replace external components first: If the compressor windings appear normal, replace the start relay, overload protector, and capacitor with Siemens-approved parts.
• 7. Reassemble and test: Refit the electrical cover and rear panel, restore power, and monitor compressor operation and E5 status.

Important: If the compressor itself is faulty, replacement requires specialized tools and refrigerant handling and must be done by a certified refrigeration technician.