Maytag Dishwasher Error Code SF1

SF1 stands for Conductivity Fault on a Maytag dishwasher. It means the control board has detected an error with the conductivity sensor, which is part of the Wash Process Sensor assembly. This sensor monitors water quality during the wash cycle, and when it sends an abnormal or absent signal, the SF1 code is triggered. The fault can originate from the sensor itself, the wiring connecting it to the control board, or the control board.

A reset may temporarily clear the SF1 code, but it will return if the underlying problem with the conductivity sensor or its wiring has not been addressed. Resetting the dishwasher by cutting power for a few minutes is a reasonable first step to confirm the fault is active, but it is not a fix on its own. The sensor and connections need to be properly inspected and repaired for the code to stay clear.

Repair costs vary depending on which component is at fault. If only a wiring connection needs to be reseated or cleaned, there may be little to no parts cost, though a service call fee still applies. A Wash Process Sensor replacement typically falls in the range of $40 to $120 for the part, while control board replacement can range from $100 to $300 or more for the part alone. Adding professional labor generally brings total repair costs to somewhere between $150 and $450 depending on the diagnosis.

Some causes of SF1 are DIY-friendly, such as reseating a loose wiring connector or cleaning mineral scale off the sensor. If the sensor has failed or the wiring harness is damaged, replacing those components requires moderate disassembly and some comfort with electrical connectors. Control board replacement is a more advanced repair that many homeowners prefer to leave to a technician.

An SF1 fault is an electrical sensor error rather than a water leak or heating hazard, so the immediate safety risk is low. However, running the dishwasher while the conductivity sensor is faulty means the control system may not be managing the wash cycle correctly, which can result in poor cleaning performance. It is best to diagnose and resolve the fault before continuing regular use.