Display shows E13; alarm may sound and temperatures may fluctuate; often related to power issues.

Safety: Always unplug the refrigerator before inspecting the power cord or control board. Do not attempt to repair high-voltage circuitry unless qualified.

Steps:

• 1. Check outlet and cord: Verify that the wall outlet is properly grounded and not loose. Inspect the power cord for cuts, burns, or kinks.
• 2. Try a different outlet: If possible, plug the refrigerator into a known-good outlet on a different circuit to rule out household wiring issues.
• 3. Use a surge protector: If E13 occurs after storms or power fluctuations, use a quality surge protector rated for refrigerators.
• 4. Inspect main control board: Remove the rear control cover and look for burnt components, especially near the power input section.
• 5. Replace main control board: If the board shows damage or if E13 persists despite stable power, replace the main control board.

Note: Persistent voltage errors can damage other components; address E13 promptly.