Blomberg
False High-Temperature Alarm
Freezer alarm sounds and high-temperature warning is active, but the interior feels adequately 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
Faulty cabinet temperature sensor, Sensor not in correct position, Control board miscalibration, Alarm circuit fault on display PCB
How to Fix / Troubleshooting
Safety first: Unplug the freezer before accessing sensors or control electronics.
Verify actual temperature:
- Place a separate freezer thermometer in the middle shelf and leave for several hours.
- Compare the reading to the displayed temperature.
Inspect sensor:
- Locate the cabinet NTC sensor and ensure it is properly mounted.
- Check wiring for damage or loose connections.
Corrective actions:
- Replace sensor: If the sensor is out of spec or giving erratic readings, install a new Blomberg-compatible NTC.
- Reset control: Disconnect power for 10 minutes to reset the control logic.
- If the alarm persists despite correct temperature and a good sensor, the main PCB or display PCB may be faulty and require replacement.
Test: After repair, monitor the alarm behavior over 24–48 hours.
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Repair Difficulty
Medium
3/5
Required Part
Cabinet NTC Temperature Sensor
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