Frigidaire Dishwasher Error Code tu

The tu error code means the control board detected a failure in the turbidity sensor during the Water Service test. The turbidity sensor monitors water clarity during a wash cycle to help the dishwasher optimize cleaning performance. This code indicates the control could not receive a valid reading from that sensor. The issue could be a wiring problem or a faulty sensor.

A reset may temporarily clear the tu code, but it will return if the underlying problem with the turbidity sensor or its wiring has not been resolved. The fault is triggered during a specific diagnostic test, so the control board will detect it again on the next cycle. A lasting fix requires addressing the wiring or replacing the sensor.

If the fix is simply reseating a loose connector, there may be little to no parts cost. Replacing the turbidity sensor itself typically costs anywhere from $20 to $80 for the part, depending on the model. If a professional technician performs the diagnosis and repair, expect total costs to range from $100 to $250 including labor.

In many cases, yes. Start by checking the wiring connector at the turbidity sensor and at the control board for loose or corroded connections, since this is the most common cause. If the connections look good, the sensor itself may need to be tested or replaced, which is a more involved repair that requires accessing the sump area at the bottom of the tub.

The tu code relates to a sensor failure rather than a water leak or electrical hazard, so running the dishwasher is unlikely to create an immediate safety risk. However, without a functioning turbidity sensor, the dishwasher cannot optimize its wash cycle based on soil levels, which may result in reduced cleaning performance. It is best to diagnose and correct the fault before continued use.