What tu means on your Frigidaire dishwasher (frigidaire tu error)
A frigidaire tu error means the turbidity (water-clarity) sensor is not reading correctly on your Frigidaire dishwasher. That sensor lets the dishwasher judge how dirty the water is and adjust the cycle, so a bad reading sets tu. Wash results may become inconsistent.
Symptoms
Checking these signs against your Frigidaire dishwasher keeps you from chasing the wrong fault, because look-alike problems call for quite different repairs. A dishwasher can show a single symptom or several combined, creeping in gradually or appearing suddenly after a surge, a spill, or fresh install work.
- Cycles run too long or too short
- Wash results vary load to load
- The code appears mid-cycle
- Auto cycles behave unpredictably
Common causes
These symptoms on a Frigidaire dishwasher can spring from several different faults, so look at the likeliest first before anything exotic. That order makes it clear whether your dishwasher needs no more than a check or a proper repair with correct Frigidaire parts.
- Dirty or fouled sensor — film coats the turbidity sensor
- Failed sensor — the sensor element has failed
- Wiring or connector fault — the sensor circuit is degraded
- Control-board fault — the reading is misinterpreted (technician)
Troubleshooting steps you can try
Give these steps a try on your Frigidaire dishwasher in order — the simplest fixes sit near the top. The instant a step involves mains voltage, gas, a hot cavity, water, or a sealed part of the dishwasher, put your tools down and call a qualified technician.
- Power-cycle the dishwasher at the breaker and run a normal cycle.
- Clean the filter and sump, since heavy debris can confuse the sensor.
- Avoid overloading or under-rinsing very dirty dishes.
- If tu returns, the turbidity sensor needs testing.
Parts a technician may replace
A technician may look at, test, or replace the turbidity sensor, wiring, and control board on your Frigidaire dishwasher, depending on what the diagnosis turns up. The component the dishwasher needs is matched from its model and serial number, and genuine OEM parts come through trusted parts suppliers rather than generic substitutes, protecting performance, safety, and the long working life of the dishwasher. Knowing exactly what failed on the dishwasher before ordering stops the repair spreading beyond the actual fault.
When to call a technician
tu generally needs a technician to test or replace the turbidity sensor. Because the rating is Low severity, your dishwasher is not in an emergency state — yet where tu persists past the checks above, a technician should confirm the cause on the dishwasher before anything is replaced. Our service is independent and not affiliated with the manufacturer: the technicians who handle your dishwasher are experienced and skilled, they fit genuine OEM parts from trusted parts suppliers, and a 30-day labor warranty stands behind the work on your dishwasher. Booking is quickest with the model and serial number of your Frigidaire dishwasher in front of you, since the right part can then be matched before the visit and the tu condition sorted in as few trips as possible.
Related help and Frigidaire resources
If the tu condition keeps returning after these checks, book Frigidaire dishwasher repair, browse our dishwasher error-code guides and step-by-step repair guides, or schedule service in your area on our locations page. See also the related i20 drain code. Full specifications and model lookup for your Frigidaire dishwasher can be found on frigidaire.com.
