Display shows F6 and the refrigerator may not respond correctly to temperature adjustments or may shut down unexpectedly.

Safety: Disconnect the appliance from mains power before accessing the control board compartment.

Troubleshooting:

• 1. Power cycle: Unplug the refrigerator for at least 10 minutes to allow capacitors to discharge. Plug back in and check if F6 clears. If it returns, continue.
• 2. Access control board: Remove the rear metal cover or top panel (depending on model) to expose the main PCB.
• 3. Inspect visually: Look for burnt components, bulging capacitors, or darkened areas on the board. Check for moisture or insect damage.
• 4. Reseat connectors: One by one, unplug and firmly reconnect all harnesses to the board, ensuring they are fully seated and keyed correctly.
• 5. Check supply voltage: With a multimeter and extreme caution (live voltage), verify that the board is receiving correct mains input and low-voltage outputs (if you are trained to do so). If not trained, skip this step and call a technician.
• 6. Replace board if necessary: If F6 persists and no external wiring faults are found, replace the main control board with the exact Ikea-compatible OEM part.

Warning: Live voltage testing should only be performed by qualified persons. If unsure, contact a professional.