Freezer displays AL16; internal communication between boards fails, some functions inoperative

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.

Possible Causes

Damaged communication harness, Oxidized connectors, Faulty display PCB, Faulty main control board

Safety first: Disconnect power before handling any electronic modules.

Steps:

Access both boards: Remove covers to reach the main control board and the display/user interface board.
Inspect harness: Check the communication cable for cuts, pinches, or signs of rodent damage. Replace if damaged.
Clean and reseat connectors: Unplug and replug all connectors between the boards. Use contact cleaner if available.
Substitute boards: If possible, replace the display PCB first. If AL16 persists, replace the main control board.

Hard 4/5

Communication Harness / Display PCB

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