Electrolux Dishwasher Error Code tu

The tu code means the control board detected a failure in the turbidity sensor during the Water Service diagnostic test. The turbidity sensor monitors how dirty the wash water is so the dishwasher can adjust its cycle accordingly. This fault indicates the control could not receive a valid reading from that sensor. The issue may be a loose connection, a wiring problem, or a failed sensor assembly.

A reset may temporarily clear the code from the display, but it will return if the underlying sensor issue has not been addressed. The tu fault is triggered during the Water Service test, so the root cause needs to be corrected before the dishwasher will pass that diagnostic without faulting again. Resetting without repair is not a lasting solution.

If the fix is simply reseating a loose connector, there may be no parts cost at all. A replacement turbidity sensor assembly typically costs in the range of $20 to $60 for the part, depending on the model. If a technician is needed for diagnosis and installation, labor costs can add $75 to $150 or more to the total. Control board replacement, if required, is considerably more expensive.

In many cases, yes. Start by checking that the turbidity sensor wiring harness is securely connected and that the connector pins are clean and free of corrosion. If the connections look good but the code persists, the sensor assembly itself may need to be replaced. Wiring inspection and connector cleaning are DIY-friendly tasks, but sensor replacement requires some comfort with disassembly.

The tu code specifically relates to a diagnostic test failure rather than a water leak or electrical hazard, so it does not present an immediate safety risk. However, without a functioning turbidity sensor, the dishwasher may not be able to optimize cycle performance and could run inefficiently. It is best to resolve the fault before relying on the dishwasher for regular use.