Error code reference

Maytag Dishwasher Error Code Turbidity Sensor failure

Turbidity sensor failure detected during Field Service Test; indicated by Rinse Only LED flashing along with…

Maytag codesMaytag dishwasher codes

Turbidity sensor failure detected during Field Service Test; indicated by Rinse Only LED flashing along with Clean LED (front controls) or Delay LED (top & front controls).

First step from the service manual

Run Field Service Test to confirm. Check turbidity sensor and wiring.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What Turbidity Sensor failure means on a Maytag dishwasher

The Maytag dishwasher control board detected a fault with the turbidity sensor during the Field Service Test routine. The turbidity sensor monitors water clarity inside the tub, feeding data to the control board so it can adjust wash cycle intensity and duration based on how soiled the water is. When this fault is present, the Delay LED and Hi Temp Wash LED flash simultaneously to signal the failure code. The Field Service Test must be entered first to confirm the fault, and the Manual Function Test can then be used to isolate which component is responsible.

For homeowners, the turbidity sensor is a small component that essentially 'reads' how dirty your wash water is during a cycle. When it fails or loses communication with the control board, the dishwasher cannot accurately gauge soil levels and flags the fault rather than guessing. This typically means your dishes may not get properly cleaned, or the machine may refuse to complete a cycle.

The fault can stem from a failed sensor itself, a wiring problem between the sensor and the control board, or a control board that is misreading the signal. Confirming the fault through the built-in diagnostic tests before replacing any parts will save time and money.

Source: manufacturer service documentation.

Common causes of Turbidity Sensor failure

  1. 01

    Failed turbidity sensor

    Part replacement

    The turbidity sensor itself has failed electrically or mechanically and is no longer sending a valid signal to the control board. This is the most common reason the fault code appears after diagnostic tests confirm the issue.

  2. 02

    Damaged or disconnected wiring harness to turbidity sensor

    Wiring / connection

    The wiring harness connecting the turbidity sensor to the control board may have a broken wire, corroded connector, or loose plug, causing an open or intermittent circuit that the control board reads as a sensor fault.

  3. 03

    Turbidity sensor covered in buildup or debris

    Wiring / connection

    Heavy mineral deposits, grease, or food debris coating the sensor lens can cause inaccurate readings that trigger a fault. Cleaning the sensor surface may resolve the code without part replacement.

  4. 04

    Faulty main control board

    Part replacement

    If the turbidity sensor and its wiring both test within spec, the main control board may be failing to correctly interpret the sensor signal. Control board replacement is typically a last resort after all other causes are ruled out.

See the test procedure for each cause

Frequently asked questions about Turbidity Sensor failure

What does the Turbidity Sensor Failure code mean on a Maytag dishwasher?
This code means the control board detected a fault with the turbidity sensor during the Field Service Test. The turbidity sensor monitors how dirty the wash water is so the dishwasher can adjust the cycle accordingly. When the sensor or its wiring fails, the control board flags the fault and flashes the Delay LED and Hi Temp Wash LED together. Running the Field Service Test confirms the code before any parts are replaced.
How do I fix the Turbidity Sensor Failure code on a Maytag dishwasher?
Start by entering the Field Service Test to confirm the fault code, then use the Manual Function Test to check the turbidity sensor and related components individually. First inspect the sensor for debris or mineral buildup and clean it if needed. If cleaning does not resolve it, check the wiring harness for damaged or loose connectors. If the wiring is intact, replacing the turbidity sensor is the most likely fix. Only replace the control board if the sensor and wiring both check out correctly.
Can I still use my Maytag dishwasher when the Turbidity Sensor Failure code is active?
The dishwasher may still run cycles, but it cannot accurately measure water soil levels, which means wash performance will be inconsistent and dishes may not come out fully clean. Running the machine long-term with this fault active also risks the control board making poor cycle decisions based on missing sensor data. Addressing the fault promptly is advisable, but there is no immediate safety hazard that would prevent short-term use.
How much does it cost to fix a Turbidity Sensor Failure on a Maytag dishwasher?
A replacement turbidity sensor typically costs between $20 and $60 for the part, and replacing it is a manageable DIY repair for someone comfortable with basic appliance work. If a technician is hired, expect an additional $100 to $150 in labor. If the control board turns out to be the cause, board replacement parts can run $150 to $300 or more, which may shift the cost-benefit calculation toward replacing an older machine.
How do I enter the Field Service Test on a Maytag dishwasher to check the Turbidity Sensor Failure code?
The Field Service Test is accessed through a specific button sequence on the control panel, which varies by model, so check your model's service manual or tech sheet for the exact steps. Once in the test mode, the control will cycle through fault codes and the Turbidity Sensor Failure will be confirmed by the Delay LED and Hi Temp Wash LED flashing together. From there, the Manual Function Test lets you activate individual components to further isolate whether the sensor, wiring, or control board is the source of the fault.

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