E4 error appears and the air fryer will not start or stops mid-cycle

Safety First: Unplug the air fryer and let it cool completely. Do not bypass or jumper safety thermostats or fuses; this is a fire and shock hazard.

• Step 1 – Verify external airflow: Confirm that the unit has proper clearance and that vents are not blocked by walls, cabinets, or objects. Remove any plastic or paper items near the exhaust.
• Step 2 – Access heater circuit: Remove the rear or top cover to access the heating element assembly. Locate the thermal fuse and high‑limit thermostat in series with the heater.
• Step 3 – Visual inspection: Look for burnt connectors, charred wiring, or discoloration around the heater and safety devices. Replace any burnt terminals and repair wiring as needed.
• Step 4 – Test continuity: With a multimeter and the unit unplugged, test the thermal fuse and high‑limit thermostat for continuity. If either is open, it has tripped or blown and must be replaced with the exact Frigidaire‑specified part.
• Step 5 – Check heating element: Measure resistance of the heating element. A dead short (very low resistance) or visible cracks in the element indicate it should be replaced before installing new safety devices.
• Step 6 – Reassemble and test: After replacing failed components, reassemble the unit and run a short test cycle while monitoring for abnormal smells or noises.
• Call a professional: If you find multiple burnt components or are not comfortable testing live circuits, contact a qualified technician.