Air fryer will not start and displays E1 on the control panel.

Safety first: Unplug the air fryer from the wall outlet and allow it to cool completely before any inspection. Never work on a live appliance.

Step-by-step checks:

• Power reset: Unplug the unit for 5 minutes, then plug back in and try again. Sometimes E1 can be a transient sensor reading error.
• Inspect sensor wiring: Remove the rear or top cover (depending on model) by taking out the perimeter screws. Locate the cavity temperature sensor (NTC)—usually a small metal probe or bulb clipped near the heater or cavity wall with two thin wires leading to the main PCB. Check for loose connectors, broken wires, or signs of heat damage. Reseat the connector firmly on the PCB.
• Check sensor continuity: With a multimeter set to resistance (ohms), measure across the two sensor leads. A typical NTC will show a resistance in the kilo-ohm range at room temperature (e.g., 5–100 kΩ). If the meter reads OL (open), the sensor is defective.
• Inspect main PCB: Look for burnt spots, cracked solder joints, or corrosion around the sensor input connector on the main control PCB. If the sensor tests good but E1 persists, the PCB may be faulty.

Corrective action:

• If the sensor is open or physically damaged, replace the cavity temperature sensor (NTC) with a Samsung-compatible part for your exact model.
• If wiring is damaged, repair or replace the sensor harness using high-temperature rated wire and proper crimp connectors.
• If the PCB is visibly damaged or E1 remains after sensor replacement, replace the main control PCB. This may be best handled by a qualified technician.