Bosch Thermostat / Temperature Control Malfunction

The freezer is overcooling: Food is excessively hard or showing freezer burn, even at normal settings.

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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

A faulty NTC temperature sensor reading too warm, a stuck compressor relay on the control board, incorrect control calibration, or the SuperFreeze function being stuck on.

How to Fix / Troubleshooting

Safety: Disconnect power before accessing sensors or control boards.

Steps:

  • Check settings: Verify that the temperature is not set too low and that SuperFreeze is off.
  • Measure actual temperature: Place a thermometer in the freezer and compare it to the displayed value.
  • Inspect sensor: Access the freezer compartment sensor and test its resistance at a known temperature. Replace if out of specification.
  • Control board: If the sensor is correct but the compressor runs excessively, the control board relay may be stuck. Replace the main control module if confirmed.
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Repair Difficulty

Medium 3/5

Required Part

Freezer Compartment NTC Temperature Sensor
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