Air fryer will not start and displays E1 on the control panel.

Safety first: Unplug the air fryer and let it cool completely before opening any panels. Never work on a live appliance.

Steps to check the E1 error:

• 1. Power reset: Unplug the Hamilton Beach air fryer for 5–10 minutes, then plug it back in and try again. If E1 returns, continue.
• 2. Inspect the rear / bottom sensor harness: Remove the basket and look inside the cooking cavity. Most Hamilton Beach air fryers use a small metal temperature probe (NTC sensor) mounted near the fan or in the rear wall. Access is usually from the back or bottom panel (Phillips screws). Carefully remove the panel.
• 3. Check the sensor connector: Locate the two‑wire harness from the temperature sensor going to the main control board. Make sure the plug is fully seated and not corroded or burnt. Reseat the connector firmly.
• 4. Visual inspection of the sensor leads: Look for broken insulation, pinched wires, or a sensor that has pulled away from its mounting bracket. If the sensor wires are broken or the probe is loose, the sensor must be replaced.
• 5. Basic continuity check (for experienced DIYers): With the unit unplugged, use a multimeter set to resistance (ohms) across the two sensor leads. A typical NTC sensor will show some resistance (often 5–200 kΩ at room temperature). If the meter reads OL (open) or 0 Ω (short), the sensor is defective.
• 6. Inspect the control board: If the sensor and wiring look good, the sensor input on the main PCB may be damaged. Look for burnt spots or cracked solder joints around the sensor connector.
• 7. Replace parts as needed: If the sensor is open or physically damaged, replace the temperature sensor assembly. If the sensor tests good but E1 persists, the main control board will likely need replacement.

When to stop: If you are not comfortable opening the cabinet or using a meter, stop after the power reset and visual checks and contact a qualified appliance technician.