De Dietrich False High-Temperature Alarm

Alarm beeping and temperature warning light on, but interior feels cold and food is frozen.

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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

Temperature sensor out of calibration, Sensor not properly attached to liner, Recent warm loading causing temporary spike, Control board logic error

How to Fix / Troubleshooting

Safety first: Use caution when handling interior panels; unplug the unit if accessing wiring.

Steps:

  • 1. Check actual temperature: Place a separate thermometer in the refrigerator and freezer to verify real temperatures.
  • 2. Silence the alarm: Use the control panel to acknowledge or mute the alarm.
  • 3. Inspect the sensor: If the alarm persists despite correct temperatures, check that the relevant NTC sensor is firmly attached to the liner or evaporator and not hanging loose.
  • 4. Replace the sensor: If readings are inconsistent with actual temperature, install a new NTC sensor.
  • 5. If problem continues: The main PCB may misinterpret sensor data and require replacement.
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Repair Difficulty

Medium 3/5

Required Part

Refrigerator Compartment NTC Temperature Sensor
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