Display shows F5 and the wine cooler may not cool properly; compressor may not start or may short-cycle.

Safety first: Unplug the appliance. The compressor and related components operate at mains voltage. Allow hot components to cool before touching.

F5 indicates a problem in the compressor start or run circuit.

• 1. Access the compressor compartment:
  • Pull the wine cooler away from the wall.
  • Remove the lower rear service panel to expose the compressor and control components.
• 2. Inspect the start device:
  • Locate the start relay/PTC and overload protector mounted on the compressor terminals.
  • Check for burn marks, melted plastic, or a burnt smell.
• 3. Check wiring:
  • Ensure all spade connectors are tight on the compressor and start device.
  • Look for discolored or brittle wires and replace if necessary.
• 4. Test the start device:
  • With power off, remove the start relay/PTC from the compressor.
  • Shake it gently; if it rattles excessively or shows signs of burning, replace it.
• 5. Test compressor windings (advanced):
  • Using a multimeter, measure resistance between the three compressor pins.
  • All readings should be finite and not shorted to ground. If windings are open or shorted, the compressor is defective.
• 6. Replace faulty parts:
  • Install a new Miele-specified compressor start device/overload if defective.
  • If the compressor is faulty, replacement requires a sealed-system technician with refrigeration certification.
• 7. Control board check: If the compressor and start device test good but F5 persists and the compressor never receives power, the main control board relay may be defective and should be replaced by a professional.