C-70
Samsung
Cooling Fan Speed / Feedback Error
Oven displays C-70 and may not heat or may shut down during use.
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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
Failed cooling fan motor, Blocked fan blades, Faulty fan speed sensor (tach feedback), Damaged wiring between fan and PCB
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker and allow the oven to cool.
- Visual inspection:
- Remove the rear or top panel to access the cooling fan.
- Check for insulation, wiring, or debris caught in the fan blades.
- Manual test:
- Spin the fan by hand; it should rotate freely without grinding.
- If stiff or seized, replace the cooling fan motor.
- Check wiring:
- Inspect the harness from the fan to the main PCB for cuts, burns, or loose connectors.
- Replace components:
- If the fan does not run when commanded (during bake) and has proper voltage, replace the fan motor.
- If the fan runs but the code persists, the tach feedback or PCB circuit may be faulty; main PCB replacement may be required.
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Repair Difficulty
Hard
4/5
Required Part
Cooling Fan Motor
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