Air fryer displays E9 and beeps continuously; unit will not operate.

Safety first: Unplug immediately. Do not repeatedly reset a unit with a power fault code.

• Check external power: Verify the outlet has correct voltage using another appliance. Avoid using surge protectors or extension cords temporarily to rule them out.
• Inspect power cord: Look for cuts, kinks, or burn marks along the Instant Pot air fryer power cord and plug. Replace the cord set if damaged.
• Internal inspection (advanced): Remove the cover and inspect the area where the power cord enters the unit and connects to the main board. Look for loose connections, burned terminals, or damaged components.
• Check the internal fuse: Many models include an internal fuse on the power input. Test it with a multimeter; if open, replace with the exact same rating. If it blows again immediately, there is a deeper short that must be diagnosed.
• Board replacement: If the power supply section of the main control board shows damage or if E9 persists after replacing a blown fuse, the entire board should be replaced.

Because this involves mains voltage and power electronics, users without electrical experience should contact a professional.