Air fryer powers on and fan runs, but there is no heat; food remains uncooked.

Safety first: Unplug and allow the unit to cool completely before accessing the heater area.

• Check basic settings: Confirm that a temperature above ambient is selected and that the timer is running. Some models require pressing start twice.
• Inspect heater connections: Remove the top or rear cover to access the heating element. Ensure both heater terminals are firmly connected and not oxidized.
• Test thermal fuse: Locate the small cylindrical or disc‑shaped thermal fuse attached to the heater bracket. Test for continuity with a multimeter. If open, replace with the same temperature and current rating.
• Measure heater resistance: Disconnect the heater leads and measure resistance across the element. An open circuit indicates a failed heating element that must be replaced.
• Check relay operation: Listen for a click when starting a cycle. If no click and the heater tests good, suspect the heater relay or control PCB.

Warning: Never bypass the thermal fuse; it is a critical safety device.