Display shows E9 and the compressor and fan may stop; unit may not respond to temperature changes.

Safety warning: Unplug the wine cooler before accessing the electronics. Do not attempt component-level repair unless you are qualified.

• Power reset: Disconnect power for at least 10 minutes, then reconnect. If E9 reappears immediately, proceed with inspection.
• Access the main control PCB: Remove the rear upper or lower service panel (depending on model) to expose the control board enclosure. Open the enclosure carefully.
• Visual inspection: Look for burnt areas, swollen capacitors, or damaged relays on the PCB. Check for signs of moisture or insect damage.
• Check connectors: Reseat all harness connectors to the PCB, ensuring firm contact and correct orientation.
• Verify supply voltage: With the unit powered (only if you are trained and using proper precautions), verify that the PCB is receiving correct mains voltage and that low-voltage outputs (e.g., 12 VDC) are present. Then disconnect power again.
• Replace PCB: If visible damage is present or E9 persists after reseating connectors, replace the main control PCB with the correct Teka part number. Transfer any configuration jumpers as per service documentation.
• Professional help: Because the control PCB is critical to safe operation, replacement is best performed by an authorized technician.