Air fryer shows E9 and does not heat; fan may still run.

Safety first: Unplug the appliance and let it cool. Sensors near the exhaust can be very hot.

Locate the sensor:

• On some Samsung models, a second exhaust or ambient temperature sensor is mounted near the rear vent or on the top panel inside the unit.
• Remove the cover and trace the small-gauge wires from the exhaust area back to the main PCB.

Inspection and testing:

• Check the sensor body for cracks, discoloration, or physical damage.
• Ensure the connector at the PCB is fully seated and free of corrosion.
• Measure resistance across the sensor with a multimeter. Compare to the expected range for your model (typically several kΩ at room temperature). An open or shorted reading indicates failure.

Corrective action:

• Replace a defective exhaust temperature sensor with the correct Samsung part number.
• Repair or replace any damaged sensor harness.
• If the sensor tests good but E9 persists, the main control PCB sensor input circuit may be faulty and require replacement.