Refrigerator display shows E0 and unit may not cool properly or may behave erratically.

Safety first: Unplug the refrigerator or switch off the dedicated breaker before removing any panels.

Steps to try:

• Power reset: Disconnect power for 5–10 minutes, then restore power. Sometimes E0 clears after a hard reset.
• Check for loose connections: Remove the top grille and access the control compartment (location varies by model). Inspect the main control board wiring harnesses for loose or partially seated connectors. Reseat each connector firmly.
• Inspect for board damage: Look for burn marks, swollen capacitors, or corrosion on the main control board.
• Check incoming power: Verify the outlet supplies a stable 120V AC using a multimeter. Avoid using extension cords or surge strips.

If the code returns repeatedly after a reset and wiring check, the main control board is likely faulty and should be replaced. Programming on Viking boards often requires model-specific configuration; if you are not comfortable with this, contact a Viking-authorized technician.