Refrigerator displays E12 and may shut down or limit operation; often associated with power supply issues.

Safety: Mains voltage is dangerous. Disconnect power before opening any electrical compartments. If you are not experienced with electrical work, contact a professional.

Steps:

• 1. Check outlet and supply: Verify that the wall outlet provides stable voltage and is not shared with heavy loads that cause drops. Avoid using extension cords.
• 2. Inspect power cord: With power disconnected, check the cord for cuts, burns, or kinks. Replace if damaged.
• 3. Access main control area: Remove the cover over the main control board. Inspect for burnt components or discoloration near the power input section.
• 4. Reseat connectors: Ensure the power input connector and ground connections are tight and corrosion-free.
• 5. Replace main control board: If visible damage is present or E12 persists despite a stable supply, the internal power supply on the main board is likely faulty. Replace the board with the correct Gaggenau part.

Important: Do not bypass fuses or safety devices. If in doubt, have an authorized technician perform the repair.