E5 appears on the display and the unit will not start a cooking cycle.

Safety first: Unplug the air fryer before opening any panels. Do not bypass safety components.

• Verify supply voltage: If you have a multimeter and are qualified, measure the outlet voltage (should be around 120V in North America). If significantly low, contact an electrician.
• Check cord seating: Ensure the power cord is fully inserted into the air fryer (for detachable cords) and the wall outlet. Try a different known‑good outlet.
• Inspect internal connections: Remove the rear or bottom cover and inspect the line filter board (if present) and wiring to the main control board. Tighten any loose connectors.
• Look for damage: On the main control board, inspect the low‑voltage power supply section (small transformer or switching power supply). Burn marks or a burnt smell indicate board failure.
• Replace faulty board: If wiring and supply voltage are correct but E5 persists, replace the main control board or line filter board as applicable to your model.