Display shows E0 and refrigerator may not cool correctly or may behave erratically.

Safety first: Unplug the refrigerator from the wall outlet before removing any panels. Do not work on live circuits.

Step-by-step:

• Power reset: Unplug the fridge for 5–10 minutes. This can clear temporary control glitches. Plug back in and check if E0 returns.
• Check power quality: Ensure the outlet is properly grounded and not shared with heavy appliances (microwave, dishwasher). Avoid extension cords.
• Inspect rear connections: Pull the unit out carefully. Remove the rear lower service cover (usually a few screws). Check the main control board wiring harnesses for loose or partially seated plugs. Reseat each connector firmly.
• Look for board damage: With power still disconnected, visually inspect the PCB for burn marks, swollen capacitors, or corrosion. If present, the board likely needs replacement.
• Restore power and test: Refit the cover, plug the unit back in, and monitor for 10–15 minutes. If E0 reappears or cooling is unstable, the main PCB may require replacement by a qualified technician.

When to stop: If you smell burning, see arcing, or the breaker trips, disconnect power immediately and contact a professional.