Freezer displays E6 and may not respond correctly to keypad or touch controls; temperature settings may not change.

Safety: Disconnect power before removing the control panel or touching any wiring.

Steps:

• Inspect control panel: Check for signs of moisture, condensation, or physical damage on the front display and buttons.
• Remove control housing: On Sharp upright freezers, the control panel is usually at the top front. Remove the screws securing the housing and gently pull it forward.
• Check ribbon cable / harness: Locate the flat ribbon or multi-wire connector between the user interface board and the main PCB. Reseat the connector: unplug, inspect for corrosion or bent pins, and plug back in firmly.
• Dry and clean: If moisture is present, allow the panel to dry completely. Clean light corrosion with electronic contact cleaner and a soft brush.
• Test operation: Reassemble loosely, restore power, and test buttons. If E6 persists and controls remain unresponsive, the user interface board or main PCB may be defective.
• Replace faulty board: If the display lights but does not respond, replace the user interface/control panel assembly. If the panel is dark or communication errors persist with a known-good panel, replace the main control PCB.

Note: Handle electronic boards by the edges and avoid static discharge by grounding yourself before touching components.