Jenn-Air Dishwasher Error Code E:30

The E:30 code means the dishwasher's Aqua sensor, a turbidity sensor that monitors water clarity, failed to complete its calibration check at the start of a cycle. The appliance will continue to operate but will run without the adaptive input from that sensor. The most common causes are a dirty sensor lens or a wiring issue between the sensor and the control board.

The dishwasher is generally safe to continue using with the E:30 fault active. The control board is designed to fall back to fixed cycle operation when the Aqua sensor is unavailable, so the appliance will still wash dishes. However, without the sensor adjusting cycle parameters, water and energy usage may be less efficient than normal.

If the fix is simply cleaning the Aqua sensor, there is no parts cost and only your time is involved. If the sensor itself has failed and needs replacement, parts typically range from around $20 to $80 depending on the model, plus labor if a technician is involved. A control board replacement, which is rarely needed, can cost significantly more, often in the $150 to $400 range for parts alone.

In many cases, yes. Start by locating the Aqua sensor, inspecting it for grease or limescale buildup, and cleaning the lens carefully. Also check that all wiring connectors to the sensor are fully seated and free of corrosion. If the sensor is clean and connections are secure but the code returns, a replacement sensor or professional diagnosis may be needed.

A reset may temporarily clear the code from the display, but if the underlying cause is not corrected, the fault will return the next time the appliance attempts to calibrate the Aqua sensor at the start of a cycle. Cleaning the sensor or resolving any wiring issue is necessary for a lasting fix.