AL03
Brandt
Display / User Interface Communication Error
Freezer shows AL03; interior temperature display is blank or shows unrealistic values
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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
Loose connection between display PCB and main control board, Faulty display PCB, Damaged wiring harness in door or front panel, Main control board failure
How to Fix / Troubleshooting
Safety first: Unplug the freezer before removing the control panel or display. Handle electronic boards by the edges to avoid static damage.
Troubleshooting steps:
- Power reset: Disconnect power for 5–10 minutes, then reconnect. If AL03 reappears immediately, continue.
- Access the display panel: Remove the screws or clips securing the front control/display panel (usually at the top front or on the door). Gently pull it forward.
- Check connectors: Inspect the ribbon cable or wiring harness between the display PCB and the main control board. Reseat all connectors firmly. Look for bent pins, corrosion, or broken wires.
- Inspect the display PCB: Look for burnt components, cracked solder joints, or moisture damage. If present, the display PCB should be replaced.
- Check harness continuity (advanced): With power off, use a multimeter to verify continuity of each conductor in the harness between the display and main board. Replace the harness if any conductor is open.
- If wiring and display are good: The main control board is likely at fault. Replace the electronic control module with the correct Brandt part number.
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Repair Difficulty
Medium
3/5
Required Part
Display PCB / User Interface Board
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