Grundig Short Cycling / Control Instability

Wine cooler turns on and off frequently in short cycles.

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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

Incorrect temperature differential settings, Faulty temperature sensor, Oversized compressor for cabinet volume, Control board hysteresis error

How to Fix / Troubleshooting

Safety: Unplug the unit before accessing internal electronics.

  • Check ambient conditions: Ensure the wine cooler is not installed in a very hot or very cold environment outside Grundig's specified range.
  • Verify sensor placement: Make sure the cabinet NTC sensor is not directly in the airflow from the evaporator, which can cause rapid temperature swings.
  • Test and replace sensor: If the sensor is faulty, replace it with a Grundig cabinet NTC temperature sensor.
  • Replace control board: If short cycling persists with a good sensor and proper installation, the main PCB may be miscontrolling the compressor and should be replaced.
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Repair Difficulty

Medium 3/5

Required Part

Main Control Board
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