Maytag Dishwasher Error Code SF3

SF3 means the main control board and the sensor pack are not communicating with each other. The sensor pack monitors conditions during the wash cycle and sends that information to the controller. When that communication link fails, the dishwasher displays SF3 and stops operating. The problem is usually a loose connection, a damaged wiring harness, or a failed sensor pack or control board.

A reset may temporarily clear the SF3 code, but if the underlying communication problem is still present, the error will return as soon as the dishwasher attempts to run a cycle. Disconnecting power for a few minutes can reset the control board, but it is not a fix for a loose connection, damaged wiring, or failed component. The root cause needs to be diagnosed and corrected for the error to stay clear.

Repair costs vary depending on which component is at fault. If only a wiring connection needs to be reseated or cleaned, the cost is minimal. Sensor pack replacement typically falls in the range of $50 to $150 for the part, plus labor if a technician is hired. Control board replacement is more expensive, generally ranging from $100 to $300 or more for the part alone. Getting a diagnostic assessment from a technician can help confirm which component is actually at fault before committing to parts costs.

Some cases of SF3 can be resolved without professional help. Start by checking that all wiring connectors between the sensor pack and the control board are fully seated and free of corrosion. If the connections are secure and the error persists, replacing the sensor pack is a repair many experienced DIYers can handle with basic tools. Control board replacement is also feasible but requires more comfort working with electronics and disconnecting multiple wiring harnesses.

Running the dishwasher while SF3 is active is not recommended. The error means the control board cannot monitor the cycle properly through the sensor pack, so it cannot detect or respond to abnormal conditions. Most dishwashers will stop the cycle when this fault is present rather than continue operating. Attempting to force the unit to run could result in an incomplete wash or potential damage to other components.