Freezer not cooling at all, interior warm, but lights and display work

Safety first: Unplug the freezer before removing rear panels. Do not attempt to open the sealed refrigeration system yourself.

Steps:

• 1. Check compressor operation: Listen at the back. If the compressor is silent and not vibrating, check if it attempts to start (clicking sounds). If it never attempts, suspect control or start components.
• 2. Verify condenser temperature: If the compressor runs continuously but the condenser coil stays cool, there may be a refrigerant issue.
• 3. Inspect for oil stains: Look around joints, condenser, and evaporator area for oily residue, which can indicate a refrigerant leak.
• 4. Basic electrical checks: Confirm that the thermostat or electronic control is calling for cooling (set to a low temperature) and that the compressor start relay and overload are intact.
• 5. Call a professional: Loss of refrigerant, compressor failure, or internal blockages require a certified refrigeration technician with proper tools and Miele-compatible refrigerant.