AL18
Brandt
Display Temperature Calibration / Sensor Mapping Error
Freezer displays AL18; unit may run but interior temperature reading is clearly wrong
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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 sensor calibration in control board, Faulty temperature sensor, Software fault in control module, Wrong replacement board installed
How to Fix / Troubleshooting
Safety first: Unplug the freezer before accessing sensors or boards.
Steps:
- Verify with a thermometer: Place an accurate freezer thermometer inside and compare to the displayed temperature.
- Check sensors: Test both cabinet and evaporator NTC sensors for correct resistance at known temperatures. Replace any that are out of spec.
- Confirm correct board: Ensure any replacement main control board matches the exact Brandt model and version.
- Replace control board: If sensors are correct and AL18 persists, replace the main control board to restore proper calibration.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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