H0
Samsung
Overheat Protection / High Temperature Lockout
Display shows H0 or HO and the unit will not start or stops mid-cycle.
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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
Blocked air vents, Failed or slow circulation fan, Excessive grease buildup around heater, Faulty high-limit thermostat stuck open
How to Fix / Troubleshooting
Safety first: Unplug the air fryer and allow it to cool completely before cleaning or disassembly.
Ventilation and cleanliness:
- Ensure the air fryer is used on a hard, heat-resistant surface with clear space around all vents.
- Clean the basket, crisper tray, and interior cavity to remove grease that can trap heat.
- Use a soft brush or vacuum to clean external vents.
Internal checks:
- Inspect the circulation fan and heater area for grease buildup and clean carefully.
- Test the high-limit thermostat for continuity. If it remains open at room temperature, it has failed.
Corrective action:
- Replace a failed high-limit thermostat with the correct temperature rating.
- Replace a weak or non-operational circulation fan motor if airflow is inadequate.
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Repair Difficulty
Hard
4/5
Required Part
High-Limit Thermostat
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