Display shows E8 and the unit powers on but none of the cooking functions will start.

Safety first: Unplug the air fryer before removing the control panel or front bezel. Avoid using sharp tools on the touch surface.

Step-by-step checks:

• Power reset: Unplug the unit for 10 minutes, then plug back in and test. Temporary glitches can sometimes clear.
• Clean the touch surface: Wipe the control panel with a slightly damp, lint-free cloth and mild detergent. Dry thoroughly. Do not allow liquid to seep into the panel edges.
• Inspect ribbon cable: Remove the front control panel cover to access the flat ribbon cable connecting the touch panel to the main control board. Reseat both ends carefully, ensuring they are fully inserted and locked.
• Check for corrosion or damage: Look for greenish corrosion, bent pins, or cracked traces on the touch PCB. Any visible damage usually requires replacement.
• Test buttons: After reassembly, plug in and test each button or touch area. If E8 persists and no keys respond, the touch panel or control board is likely defective.

When to stop: If reseating cables and cleaning do not restore operation, replacing the touch control panel assembly or main control board is recommended. This is best done by a qualified technician.