Whirlpool Dishwasher Error Code 3-3

The 3-3 code indicates an OWI (Optical Water Indicator) calibration failure. The OWI sensor monitors water turbidity during the wash cycle, and this fault means the sensor could not establish a valid calibration reading. The most common causes are a dirty sensor lens, a failed OWI sensor, or a faulty drain check valve allowing dirty water to re-enter the tub before calibration runs.

The 3-3 error does not indicate an electrical hazard or a water leak risk on its own, but running the dishwasher with a faulty OWI sensor or a leaking drain check valve means it may not clean dishes effectively. Dirty water re-entering the tub can also leave residue and odors inside the dishwasher. It is best to diagnose and correct the fault before continuing regular use.

If the fix is simply cleaning the OWI sensor lens, the cost is minimal, typically just your time or a small amount for cleaning supplies. Replacing a drain check valve generally runs in the range of $10 to $40 for the part, depending on the model. A replacement OWI sensor typically costs between $30 and $80 for the part. If you hire a technician, expect additional labor charges on top of part costs.

In many cases, yes. Start by locating the OWI sensor on the sump and cleaning the lens with a soft cloth and white vinegar to remove scale and grease buildup. Also inspect the drain check valve for debris or wear that would prevent it from seating properly. If cleaning resolves the contamination issue, the code should clear after a successful calibration cycle. A failed OWI sensor or drain check valve that needs replacement may require basic appliance repair skills and part sourcing.

A basic power reset may temporarily clear the code, but if the underlying cause is still present, such as a dirty OWI lens, a failed sensor, or a faulty drain check valve, the 3-3 fault will return during the next cycle when the OWI attempts calibration. The fault needs to be resolved at the component level, not just cleared from the control board.