E05 appears on the display; freezer may not respond correctly to set temperature changes.

Safety: Disconnect mains power before removing the control panel.

Procedure:

• Power reset: Unplug the freezer for 10 minutes, then reconnect. If E05 clears temporarily, the issue may be intermittent connection or moisture.
• Access control panel: Remove the trim and screws securing the display/control panel (often at the top front of the freezer door or cabinet).
• Inspect connectors: Carefully disconnect and reconnect the ribbon cable or wiring harness between the user interface and main control board. Look for bent pins, corrosion, or signs of moisture.
• Dry moisture: If condensation or liquid is present, gently dry the area with a soft cloth and allow the panel to air dry completely before reassembly.
• Check for damage: Examine the user interface PCB for burn marks, cracked solder joints, or physical damage.
• Replace faulty part: If the user interface board is damaged, replace it with a Bosch-compatible control panel. If the interface looks fine but E05 persists, the main control module may need replacement.

Note: Avoid spraying cleaners directly onto the control panel; apply to a cloth instead to prevent future moisture damage.