Freezer displays AL10; super-freeze (fast freeze) function does not activate or remains stuck on.

Safety first: Unplug the freezer before accessing the control panel or main board.

• Reset control: Disconnect power for 10 minutes to clear temporary logic errors. Reconnect and test the super-freeze button.
• Check button operation: Press the super-freeze button several times. If it feels stuck or does not click, the switch may be mechanically faulty. Replace the Fagor control panel keypad or switch assembly if necessary.
• Observe behavior: If super-freeze remains on constantly, the relay on the control board may be welded closed. This can cause continuous compressor operation.
• Inspect control board: Remove the control housing and visually inspect the board for burnt or discolored relay contacts. Replace the electronic control board if damage is found.
• Professional service: Because this fault involves control electronics and compressor cycling, a qualified technician is recommended for final diagnosis and board replacement.