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Error code reference

Cove Dishwasher Error Code 550147

Turbidity sensor (AE1/2) out of valid limits.

Cove codesCove dishwasher codes

Turbidity sensor (AE1/2) out of valid limits.

First step from the service manual

Clean the sensor and retest.

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

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What 550147 means on a Cove dishwasher

Error code 550147 on a Cove dishwasher indicates that the turbidity sensor, designated AE1/2 in the wiring diagram, has produced a reading outside of its acceptable operating range. The turbidity sensor measures the clarity of the wash water by detecting light transmission or particle scatter, allowing the dishwasher's control system to determine how soiled the water is and adjust cycle parameters accordingly. When the sensor's output voltage or signal falls outside the valid limits defined by the control board, this error code is triggered.

The most common reason for this fault is sensor contamination. Food debris, grease buildup, or mineral scale from hard water can coat the sensor's optical window, causing inaccurate readings that fall outside the expected signal range. Because the sensor sits in the water path at the bottom of the wash tub, it is particularly susceptible to accumulation over time. Cleaning the sensor lens and surrounding housing is always the first corrective step before any component replacement is considered.

If cleaning does not resolve the fault, the sensor itself may have failed electrically, or there could be a wiring issue between the AE1/2 sensor and the control board. Damaged connector pins, broken wiring in the harness, or a faulty sensor producing an out-of-range signal would all result in this code persisting. In those cases, the sensor or the associated wiring harness would need to be inspected more thoroughly and potentially replaced.

Source: manufacturer service documentation.

Common causes of 550147

  1. 01

    Contaminated sensor lens

    Wiring / connection

    Grease, food particles, or mineral deposits on the sensor's optical surface block accurate water clarity readings. Inspect the sensor at the bottom of the tub for visible buildup and clean it thoroughly.

  2. 02

    Hard water scale buildup

    Wiring / connection

    Calcium and mineral deposits from hard water can coat the sensor over time, causing signal drift outside valid limits. Descaling the sensor and surrounding area with an appropriate cleaner may restore normal readings.

  3. 03

    Failed turbidity sensor

    Part replacement

    If the sensor has degraded electrically, it may produce a signal that is permanently outside the acceptable range regardless of cleaning. Replacing the AE1/2 turbidity sensor would be required in this case.

  4. 04

    Loose or damaged wiring connector

    Wiring / connection

    A loose pin, corroded connector, or damaged wire in the harness between the turbidity sensor and the control board can cause an invalid signal. Inspect the connector at the sensor and trace the harness for visible damage.

  5. 05

    Control board fault

    Part replacement

    In rare cases, the control board may incorrectly interpret a valid sensor signal as out of range due to a board-level failure. This should only be considered after the sensor, wiring, and connectors have been inspected and confirmed to be in good condition.

See the test procedure for each cause

Frequently asked questions about 550147

What does 550147 mean on a Cove dishwasher?
Error code 550147 means the turbidity sensor, identified as AE1/2 in the system, is producing a signal outside its valid operating limits. This sensor monitors wash water clarity to help the dishwasher manage its cycle. The fault is most often caused by a dirty or coated sensor lens rather than a failed component. Cleaning the sensor is the recommended first step before further diagnosis.
How do I fix error code 550147 on my Cove dishwasher?
Start by locating the turbidity sensor at the bottom of the dishwasher tub and cleaning it carefully to remove any grease, food debris, or mineral scale. After cleaning, run a test cycle to see if the error clears. If the code returns, inspect the sensor's wiring connector for damage or corrosion, and if those check out, the sensor itself may need to be replaced.
Is it safe to use my Cove dishwasher while error 550147 is active?
Error 550147 is a sensor fault, not an electrical or water safety hazard, so there is no immediate danger to operating the dishwasher. However, with the turbidity sensor out of range, the machine cannot accurately assess water cleanliness, which may result in suboptimal wash performance. It is best to address the fault promptly to ensure proper cycle operation.
Will resetting my Cove dishwasher clear error code 550147?
A reset may temporarily clear the error code, but if the underlying cause such as a dirty or faulty sensor is not addressed, the code will return once the dishwasher runs a cycle and the control board checks the sensor signal again. Cleaning the sensor or repairing the wiring is necessary for a lasting fix.
How much does it cost to repair error code 550147 on a Cove dishwasher?
If the issue is simply a dirty sensor, the repair cost is minimal and limited to your time or a basic service call fee. If the turbidity sensor needs replacement, parts and labor combined typically range from around $100 to $300 depending on your location and service provider. Control board replacement, if ever needed, would cost significantly more and should only be considered after all other causes are ruled out.

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