Display shows E3 and the air fryer will not heat.

Safety first: Unplug the air fryer and let it cool completely. Heating components can remain hot for a long time.

• Visual inspection: Remove the top or rear cover to access the heating element assembly. Look for broken coils, burn marks, or melted connectors.
• Check wiring: Ensure the high‑temperature wires from the main control board to the heating element are firmly attached and not charred. Replace any discolored or brittle wires with high‑temp appliance wire.
• Test the element: Disconnect at least one wire from the heating element and measure resistance with a multimeter. A typical air fryer element may read between 10–40Ω. An open circuit (OL) indicates a failed element that must be replaced.
• Inspect heater relay: On the main control board, locate the heater relay (often labeled with a heater symbol). Look for burn marks or a melted case. If the element tests good but E3 persists and the relay never clicks during a cook cycle, the main control board is likely faulty.
• Replace parts as needed: Install a new heating element assembly if open or visibly damaged. If wiring and element are good, replace the main control board.