Air fryer turns off by itself in the middle of cooking with no error code.

Safety first: Unplug and allow the unit to cool before inspection.

• Improve ventilation: Ensure the air fryer has adequate clearance and is not under low cabinets. Clean all vents and the area around the heater and fan.
• Check cord and outlet: Make sure the plug fits tightly in the outlet. Try a different outlet to rule out a loose receptacle.
• Inspect thermal cutoff: Access the heater area and locate the thermal cutoff. If it is discolored or the insulation is brittle, replace it.
• Board temperature: Check that the main control board is not directly against insulation or blocked from airflow. If the board shows heat damage, replace it.
• Monitor operation: After cleaning and checks, run a test cycle and observe. If shutdowns continue, a technician should test the thermal protection and control board more thoroughly.