Error F19 appears and the refrigerator may not cool, with the compressor not receiving a start signal.

Safety: Unplug the refrigerator before accessing the control board or compressor wiring. Live mains voltage is present in this area.

Steps:

• 1. Inspect wiring: Check the harness from the main control board to the compressor or inverter module for damage or loose connectors.
• 2. Listen for relay: Briefly plug in and listen for a click from the compressor relay when cooling should start. Then unplug again. No click may indicate a failed relay or control logic.
• 3. Board inspection: Remove the control board and inspect for burnt relay contacts or damaged traces.
• 4. Replace board: If the relay is faulty or the board is damaged, replace the main control board with the correct Ikea-compatible part.
• 5. Verify compressor: If a new board does not resolve the issue, the compressor or inverter may be faulty and should be tested by a professional.

Warning: Do not attempt to bypass safety circuits or hard-wire the compressor; this is dangerous and can cause fire or further damage.