Display shows E9 and the unit does not cool despite fans running; compressor may be off.

Safety: Always unplug the cooler before removing the control board cover. High voltage is present.

Steps:

• Check outlet: Plug another appliance or a voltage tester into the same outlet to confirm stable 110–120 V (or local mains voltage). Avoid using long or undersized extension cords.
• Inspect power cord: Examine the Auseo power cord for cuts, kinks, or burn marks. Ensure it is firmly plugged into both the outlet and the strain relief on the cabinet.
• Reset unit: Unplug for 5 minutes, then reconnect. If E9 returns immediately, the internal power supply may be faulty.
• Control board inspection: Remove the rear panel to access the main control board. Look for burnt components, bulging capacitors, or damaged fuses.
• Replace main PCB: If visible damage is present or voltage tests confirm a bad supply, replace the main control board / power module with the correct Auseo part.

Warning: Board-level repairs should only be attempted by qualified technicians; replacing the entire board is the recommended approach for most users.