Display shows E9 and temperature fluctuates widely; unit may shut down unexpectedly.

Safety: Always unplug the cooler before removing covers. Do not bypass safety grounds.

Steps:

• 1. Check outlet: Plug a different appliance or a plug-in tester into the same outlet to confirm stable power. Avoid using extension cords or power strips with the wine cooler.
• 2. Inspect power cord: Examine the NutriChef power cord for cuts, kinks, or burn marks. Replace the cord if damaged.
• 3. Reseat connections: Remove the rear panel and locate where the power cord connects to the internal wiring or power filter. Ensure all spade connectors are tight.
• 4. Examine control board: Look for burnt components, cracked solder joints, or swollen capacitors on the main control board's power supply section.
• 5. Test voltage (advanced): With appropriate safety precautions and a multimeter, a qualified person can verify that the board is receiving correct line voltage and producing stable low-voltage outputs for sensors and fans.
• 6. Replace control board: If the power supply section is unstable or damaged, replace the main control board with a compatible NutriChef board.