Refrigerator displays E8; compressor does not start or starts briefly then stops; interior may be warm.

Safety first: Unplug the refrigerator. Work at the rear only when the unit is disconnected. Compressor and inverter circuits carry mains voltage.

Steps:

• 1. Listen for compressor behavior: After plugging in (for testing only), listen for clicking or humming from the compressor area. Then unplug again before touching anything.
• 2. Access compressor compartment: Remove the rear lower cover to expose the compressor and inverter module (a small electronic box mounted near the compressor).
• 3. Check connections: Inspect the power supply to the inverter and the connector from inverter to compressor. Ensure all plugs are fully seated and not heat-damaged.
• 4. Test compressor windings: With the unit unplugged and inverter disconnected, measure resistance between compressor terminals. All three windings should show low, similar resistance and no continuity to ground. A shorted or open winding indicates a failed compressor.
• 5. Evaluate inverter: If compressor windings are good, the inverter module is the likely failure point. Replace with the exact Siemens-specified inverter for your model.
• 6. Professional service: If the compressor is faulty, replacement requires refrigerant handling and must be done by a certified refrigeration technician.

Warning: Do not attempt to open the sealed refrigeration system yourself; this is illegal in many regions without proper certification.