E12 error; freezer may not enter super-freeze mode or may exit it prematurely.

Safety first: Disconnect mains power before accessing control electronics.

Step-by-step checks:

• 1. Reset control: Unplug the freezer for 10 minutes to reset the control logic. Reconnect and attempt to activate super-freeze again.
• 2. Test button/sensor: Press the super-freeze button repeatedly and observe if the indicator LED or icon responds. If there is no response while other buttons work, the specific button or touch sensor may be faulty.
• 3. Inspect user interface PCB: Remove the control panel and check for moisture, corrosion, or cracked solder joints around the super-freeze button contacts. Replace the interface if damaged.
• 4. Check relay operation: On the main board, identify the relay associated with super-freeze (often labeled). Listen for a click when activating the function. If no click and the interface is sending the command, the relay or driver circuit may be defective and the board should be replaced.