Air fryer displays E4 and will not start a cooking cycle.

Safety: Unplug the air fryer. Overheat faults can indicate serious internal damage. Do not continue to operate until inspected.

• Allow full cool-down: Let the unit sit unplugged for at least 1 hour to ensure all components are at room temperature.
• Check external airflow: Confirm that vents are not blocked and that the unit is not placed under cabinets or near walls that trap heat.
• Internal inspection (advanced):
  • Remove the back or bottom cover to access the heater assembly.
  • Locate the thermal fuse (small cylindrical or disc component in series with the heater wires).
  • Check for visible damage or discoloration.
  • Test continuity; if open, the fuse has blown and must be replaced with the same temperature and current rating.
• Inspect heating element:
  • Visually inspect the heating coil for breaks, burn marks, or areas where it may contact metal parts.
  • Test resistance; a dead short or infinite resistance indicates a failed element.
• Replace components: Replace the thermal fuse and, if necessary, the heating element. If the new fuse blows again quickly, the main control PCB or relay may be faulty and should be replaced by a professional.