E4 appears on the display and the unit will not start a cooking cycle.

Safety first: Unplug the air fryer before inspecting the cord or outlet. Do not open the unit if you are not trained to work around mains voltage.

• Step 1 – Remove extension cords: Plug the air fryer directly into a properly grounded wall outlet. Avoid power strips or surge protectors for testing.
• Step 2 – Test outlet: Use another appliance (like a kettle) to confirm the outlet works correctly. If lights dim or the other appliance behaves oddly, have an electrician check the circuit.
• Step 3 – Inspect power cord: Check the Midea power cord for cuts, kinks, or burn marks. If damaged, the cord set should be replaced by a qualified technician.
• Step 4 – Try a different outlet: Move the air fryer to another known‑good outlet on a different circuit to rule out wiring issues.
• Step 5 – Internal inspection (advanced): If E4 persists, the main PCB’s power supply section may be damaged. Look for burnt components or bulging capacitors. Replacement of the main control board is typically required.