Samsung Overheating / Temperature Overshoot

Air fryer overheats, burns food quickly, or smokes excessively even at normal settings.

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Shorted or inaccurate temperature sensor, Stuck heater relay on main PCB, Failed high-limit thermostat, Blocked airflow around sensor

How to Fix / Troubleshooting

Safety first: Unplug immediately if you see smoke or flames. Allow to cool and clean out any burnt residue before reuse.

Cleaning and airflow:

Thoroughly clean the basket, tray, and interior surfaces to remove grease that can smoke at high temperatures.
Ensure vents are not blocked and the unit has adequate clearance.

Internal checks:

Test the cavity temperature sensor for correct resistance; replace if shorted or out of spec.
Inspect the main control PCB heater relay. If contacts are welded closed, the heater may stay on continuously.
Verify the high-limit thermostat is functional and not bypassed.

Corrective action:

Replace a defective temperature sensor or high-limit thermostat.
Replace the main control PCB if the heater relay is stuck or the board is miscontrolling temperature.

Repair Difficulty

Professional Required 5/5

Required Part

Main Control PCB

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