Maytag Dishwasher Error Code 1F1

The 1F1 code indicates a conductivity fault, meaning the dishwasher has detected an error with the Wash Process Sensor. This sensor monitors the electrical conductivity of the wash water to track water quality and soil levels. The fault can point to a wiring problem, a dirty or failed sensor, or in some cases a control board issue.

The 1F1 fault is related to a water quality sensor, not a safety-critical system like heating or electrical insulation, so the risk of immediate hazard is low. However, the dishwasher may not complete cycles correctly or may deliver poor wash performance while the fault is active. It is best to resolve the issue before relying on the appliance for regular use.

A reset may temporarily clear the 1F1 code, but the fault will return if the underlying problem with the Wash Process Sensor or its wiring has not been corrected. Resetting is useful for confirming whether the fault is intermittent or persistent, but it is not a repair. Address the root cause by inspecting the sensor connections, the sensor itself, and the control board before assuming the issue is resolved.

Start by checking the wiring connections at the Wash Process Sensor and the control board for looseness or corrosion, and reseat any suspect connectors. Next, inspect the sensor for scale or debris buildup and clean the electrodes if needed. If those steps do not clear the code, test the sensor for proper operation and replace it if it has failed. The control board should be evaluated last if all other components check out.

If the fix is simply reseating a connector or cleaning the sensor, the cost can be minimal, primarily just your time. Replacing the Wash Process Sensor typically runs in the range of $30 to $80 for the part, plus labor if a technician is involved. A control board replacement is the most expensive scenario, with parts and labor often ranging from $150 to $350 or more depending on the model and local rates.