Samsung Washer Error Code 1SF

The 1SF error code on a Samsung washer indicates a Micro Controller Operation Fail on the upper washer unit. It means the control board's central processor has stopped functioning correctly, causing the machine to halt. This is a system-level hardware fault that typically requires replacement of the PCB assembly to resolve.

No, you should not attempt to run the washer while the 1SF error is active. The microcontroller failure means the machine cannot properly manage wash cycle operations, which could lead to unpredictable behavior or further component damage. Power off the unit and have it serviced before using it again.

A basic reset is unlikely to permanently clear the 1SF error because it signals an internal hardware failure of the microcontroller rather than a temporary software glitch. You may be able to clear the code momentarily by cycling power, but the error will return as long as the underlying PCB fault remains. Permanent resolution requires replacing the faulty PCB assembly.

In most cases, the 1SF error requires replacing the upper washer's PCB assembly, which is a task best handled by a qualified technician. A knowledgeable DIYer can start by checking all wiring harness connections to the control board to rule out a loose connector. If connections are secure and the error persists, board replacement is the recommended next step.

The cost to repair a 1SF error typically involves the price of a replacement PCB assembly plus labor. Parts for Samsung washer control boards generally range from $100 to $300 depending on the model, and professional labor can add another $80 to $150. Total repair costs commonly fall in the range of $180 to $450.