Lanbo Upper Zone Cooling Failure in Dual-Zone Unit

Lower zone cools properly but upper zone is warm (dual-zone model).

Advertisements

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Advertisements

Possible Causes

Failed upper zone evaporator fan, Blocked upper air vents, Upper zone sensor failure, Control board not energizing upper zone valve or fan

How to Fix / Troubleshooting

Unplug the cooler before servicing the upper zone.

  • 1. Verify upper zone settings:
    • Ensure the upper zone is turned on and set to a proper temperature.
  • 2. Check upper zone fan:
    • Listen for the upper zone evaporator fan when cooling is active.
    • Remove the upper rear interior panel and inspect the fan.
  • 3. Clear vents:
    • Make sure bottles or shelves are not blocking air vents.
  • 4. Test upper zone sensor:
    • Measure resistance of the upper zone temperature sensor and compare to lower zone.
  • 5. Replace failed parts:
    • Install a new upper zone evaporator fan motor or sensor if defective.
  • 6. If hardware is good:
    • The dual-zone main control board may not be energizing the upper zone and should be replaced.
Advertisements

Repair Difficulty

Hard 4/5

Required Part

Upper Zone Evaporator Fan Motor
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements