Princess
Runaway Heating / Thermostat Failure
Air fryer overheats; food burns quickly and there is a strong smell of burning.
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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.
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Possible Causes
NTC sensor disconnected or reading too low, Stuck heater relay/triac on main PCB, Failed thermal cutoff bypassed or shorted, Sensor wiring damaged by heat
How to Fix / Troubleshooting
Safety first: Immediately unplug the air fryer if overheating occurs. Do not continue using it until repaired.
Steps to troubleshoot overheating:
- Inspect sensor wiring: Access the top housing and check the NTC sensor and its wires for disconnection or damage.
- Check sensor resistance: Measure resistance at room temperature. A very low value can cause the control to overheat the unit.
- Examine control PCB: Look for a heater relay or triac that appears burned or welded closed. If the heater remains on even when the unit is off, the control PCB is faulty.
- Verify thermal cutoff: Ensure the thermal cutoff is present and not bypassed. Replace if it has failed to open during overheating.
- Replace components: Replace a faulty NTC sensor, thermal cutoff, or main control PCB as required.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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