How to Fix / Troubleshooting

Safety First: Disconnect power before removing lower components.

1. Access turbidity sensor: The sensor is typically mounted on the side of the sump or tub bottom. Remove the lower rack and filter to locate it.
2. Clean sensor window: Gently wipe the clear plastic lens with a soft cloth and warm soapy water to remove film or debris.
3. Inspect wiring: Check the harness connector for corrosion or loose pins.
4. Replace sensor: If cleaning does not resolve tU-related issues, replace the Frigidaire turbidity sensor.

Persistent turbidity sensor faults may require control board calibration or replacement by a technician.

Dishwasher displays tU during diagnostics; may indicate turbidity sensor test.

Possible Causes