Oven displays C-24, often during or after self-clean, and may shut down or lock out heating.

Safety first: Turn off the oven and switch off the circuit breaker. Allow several hours for the oven and surrounding cabinetry to cool.

• Check installation and ventilation:
  • Ensure there is proper clearance around the oven per Samsung installation specs.
  • Verify that front and rear vents are not blocked by trim, foil, or objects.
• Listen for cooling fan operation:
  • Restore power and start a bake cycle at 350°F.
  • After a few minutes, listen at the control panel area for the internal cooling fan. If you do not hear it, the fan or its control circuit may have failed.
• Inspect cooling fan and high-limit devices (advanced DIY):
  • Turn power off again and remove the rear or top panel.
  • Locate the cooling fan assembly and spin the fan blade by hand; it should turn freely.
  • Check wiring to the fan motor and high-limit thermostat/thermal fuse for burns or loose connections.
• Replace failed components:
  • If the fan is seized or open-circuit, replace the cooling fan motor assembly.
  • If a thermal fuse or high-limit thermostat is open, replace it and investigate the cause of overheating (blocked vents, fan failure).
• If all hardware checks good: The main PCB may be miscontrolling the fan or misreading temperature; professional diagnosis is recommended.