Siemens
Unstable Temperature Control / Airflow Imbalance
Wine cooler interior temperature fluctuates widely; bottles alternate between too warm and too cold.
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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.
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Possible Causes
Evaporator fan not running consistently, Blocked air vents or overloaded shelves, Faulty temperature sensor, Control PCB hysteresis set incorrectly
How to Fix / Troubleshooting
Safety first: Unplug the unit before removing internal panels.
Steps to stabilize temperature:
- Check loading: Avoid overpacking shelves and blocking rear or side air vents. Allow space for air circulation.
- Verify fan operation: Listen for the evaporator fan when the compressor is running. If intermittent or noisy, inspect and replace the evaporator fan motor if needed.
- Check sensors: Inspect and reseat cabinet and evaporator sensors; replace if readings are suspect.
If fluctuations persist after airflow and sensor corrections, the main control PCB may require replacement.
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Repair Difficulty
Medium
3/5
Required Part
Evaporator Fan Motor / Temperature Sensors
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