Bosch Zone Airflow Imbalance or Single-Zone Cooling Failure

Dual-zone Bosch wine cooler has one zone much warmer than the other

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.

Possible Causes

Evaporator fan not circulating air to one zone, Blocked air ducts between zones, Faulty zone damper (if equipped), Temperature sensor error in one zone

How to Fix / Troubleshooting

Safety: Unplug the unit before removing interior panels.

Steps:

Check airflow paths: Ensure vents between zones are not blocked by bottles or shelves.
Verify fan operation: Listen for airflow in both zones. If one zone is silent, inspect the evaporator fan and replace if not running.
Inspect ducts and dampers: Remove interior panels to check for collapsed ducts or stuck dampers (on models that use them).
Test zone sensors: Measure resistance of each zone's NTC sensor and replace any that are out of specification.

Repair Difficulty

Medium 3/5

Required Part

Evaporator Fan Motor

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