Display shows E10 and the dual-zone wine cooler cannot control one of the zones correctly.

Safety: Disconnect power before accessing internal panels or the control board.

• Identify affected zone: Compare the displayed temperatures and actual bottle temperature in each zone. The zone with unrealistic readings is likely at fault.
• Locate zone sensor: Each zone in a Climadiff dual-zone cooler typically has its own NTC sensor on the rear wall or evaporator plate. Remove the interior panel for the affected zone.
• Inspect and test sensor: Check the sensor and wiring for damage. Measure resistance and compare to the other zone's sensor at the same temperature. Replace if readings differ significantly.
• Check harness to PCB: Trace the sensor wires back to the main board, looking for pinched or broken sections, especially where they pass between compartments.
• Board-level issues: If sensors and wiring test good, the main PCB may have a failed zone output. Replacement of the PCB is usually required.
• Reassemble and test: After replacing the faulty component, power up and monitor both zones for several hours to confirm stable temperatures and no E10 code.