Kenmore Dishwasher F13 Error — Water Level Sensor Fault
The F13 error code on Kenmore dishwashers points to a malfunction in the water level or turbidity sensor. This sensor monitors how much water has entered the tub and how dirty the water is, allowing the control board to adjust cycle length and water temperature dynamically.
Why the F13 Triggers
The most common cause is a dirty or clogged sensor due to food debris, grease buildup, or hard water deposits. A damaged sensor wire harness or failed sensor module will also trigger F13. Occasionally, the float switch (which backs up the sensor) can stick in the up position, causing a false low-water reading.
Cleaning the Sensor
- Remove the lower spray arm and filter assembly.
- Locate the turbidity sensor (typically mounted on the side of the sump).
- Disconnect and carefully clean the sensor window with white vinegar and a soft brush.
- Rinse thoroughly and reassemble.
When It’s More Serious
If cleaning does not resolve the F13, the sensor requires electrical testing with a multimeter. Resistance values outside specification (typically 800–2,000 ohms) indicate a failed sensor that must be replaced. Our technicians carry common Kenmore sensor parts and can complete replacement in under an hour.