Kenmore Dishwasher Error Code 3-3

Error code 3-3 means the OWI (Optical Water Indicator) failed its calibration routine. The OWI is a turbidity sensor that measures how dirty the wash water is. When the control board cannot get a valid calibration reading from this sensor, it logs 3-3. The most common reasons are a dirty lens, a damaged lens, or a wiring fault in the soil sensing circuit.

The dishwasher may still run cycles with 3-3 active, but it cannot accurately adjust cycle length or water usage without a functioning OWI. This means dishes may come out undercleaned or the machine may run longer than necessary. Using it occasionally while waiting for a part is generally safe, but it is not advisable as a long-term workaround.

Yes. The control board must perform a calibration routine with the new OWI installed before it can use the sensor correctly. Running the diagnostics cycle after replacement forces this calibration to happen. If you skip this step, the board may continue to log 3-3 even with a good sensor in place.

Start by unplugging the dishwasher to cut power. Locate the OWI in the sump area, remove it, and inspect the lens for grease, scale, or scratches. Clean the lens with a soft cloth and a mild cleaner, then reinstall it and check that all connectors in the soil sensing circuit are fully seated. Restore power and run a diagnostics cycle to force recalibration. If 3-3 returns after cleaning, replace the OWI and run diagnostics again to complete the new sensor's calibration.

If cleaning the OWI lens resolves the problem, there is no parts cost. A replacement OWI sensor typically costs between $20 and $60 depending on the specific Kenmore model. If you are comfortable removing the sump-area components yourself, this is a manageable DIY repair. Professional labor to diagnose and replace the OWI generally adds $80 to $150 to the total cost.