A 3C error on a Samsung washing machine indicates a motor-related problem. This can be caused by issues such as an overloaded machine, worn motor brushes, a faulty motor control board, loose wiring, or the motor being unable to turn freely. To troubleshoot, you can start by checking for overloading and unplugging it for several minutes. If that doesn't resolve the issue you would need to contact a Certified Repair center to have it repaired. https://www.samsung.com/us/support/service/locations/
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