Display shows E6 and the interior lights and fans may work, but the compressor does not run and temperatures rise.

Safety warning: Disconnect the IceKing refrigerator from mains before accessing the control board. Capacitors on the PCB can retain charge; avoid touching bare solder joints.

Procedure:

• 1. Power reset: Unplug for 10 minutes, then reconnect. If E6 reappears immediately, a hard PCB fault is likely.
• 2. Access the main PCB: On most IceKing refrigerators, the main PCB is located behind a cover at the rear of the unit or in a top control housing. Remove the cover screws and gently pull out the board.
• 3. Visual inspection: Look for burnt components, bulging capacitors, or darkened areas around relays. Check for signs of moisture ingress or insect damage.
• 4. Connector check: Ensure all harness connectors are fully seated and not oxidized. Reseat each connector one at a time.
• 5. Limited user repair: Component-level repair is not recommended for most users. If obvious damage is present, the safest solution is to replace the entire main control PCB with the correct IceKing part number.
• 6. Reassembly: Install the new PCB, ensuring all connectors are in the correct positions. Restore power and verify that the E6 code is cleared and cooling resumes.

Note: If the new PCB does not resolve the issue, there may be a shorted load (e.g., fan, heater, compressor) feeding back into the board. In that case, professional diagnosis is required.