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Error code reference

GE Dishwasher Error Code F15

Absent water flow (turbidity based).

GE codesGE dishwasher codes

Absent water flow (turbidity based).

First step from the service manual

Check turbidity sensor harness, replace sensor.

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

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What F15 means on a GE dishwasher

The F15 error code on a GE dishwasher indicates an absent or undetected water flow condition, determined by the turbidity sensor rather than a mechanical flow meter. The turbidity sensor monitors the clarity and movement of water inside the wash tub. When the control board receives no signal change from this sensor during a fill or wash cycle, it interprets the condition as a lack of water flow and triggers the F15 fault. This is a sensor-based detection method, meaning the error can result from either a genuine absence of water or a failure in the sensor circuit itself.

The turbidity sensor typically works by transmitting light through the water and measuring how much is received on the other side. If the sensor is fouled with debris, grease, or mineral scale, it may fail to detect water movement even when water is present. Likewise, a wiring harness fault between the sensor and the control board can interrupt the signal entirely, causing the same fault code to appear. Corrosion, loose connector pins, or a pinched wire are all common harness-related failures worth inspecting before replacing the sensor itself.

Beyond the sensor and harness, actual water supply issues can also trigger this code. A clogged inlet valve screen, a kinked supply line, or a failed water inlet valve may result in genuinely low or absent water flow, which the turbidity sensor correctly reports. Diagnosing F15 requires distinguishing between a real flow problem and a sensor circuit failure, starting with a harness inspection and sensor check as the first step.

Source: manufacturer service documentation.

Common causes of F15

  1. 01

    Faulty or fouled turbidity sensor

    Part replacement

    The turbidity sensor may be coated with grease, hard water deposits, or food debris, preventing it from detecting water movement. A failed sensor that produces no output signal will also trigger F15 even when water is present.

  2. 02

    Damaged or disconnected sensor harness

    Wiring / connection

    The wiring harness connecting the turbidity sensor to the control board may have loose pins, corrosion, or physical damage. Inspecting the connector at both ends for secure contact and continuity is a critical early step.

  3. 03

    Clogged or failed water inlet valve

    Part replacement

    If the inlet valve screen is blocked by sediment or the valve solenoid has failed, insufficient water will enter the tub. The turbidity sensor will correctly report no flow, generating the F15 code.

  4. 04

    Kinked or restricted water supply line

    Wiring / connection

    A bent or pinched supply hose behind or beneath the dishwasher can restrict water flow enough that the turbidity sensor detects no meaningful water movement during a cycle.

  5. 05

    Control board communication failure

    Part replacement

    In less common cases, the main control board may fail to correctly read or interpret the turbidity sensor signal, triggering F15 even when the sensor and water supply are functioning normally.

See the test procedure for each cause

Frequently asked questions about F15

What does F15 mean on a GE dishwasher?
F15 on a GE dishwasher signals that the control board detected absent or undetectable water flow based on input from the turbidity sensor. The turbidity sensor monitors water presence and clarity inside the tub, and if it reports no activity during a fill or wash phase, the F15 fault is triggered. The root cause may be a genuine lack of water entering the unit or a failure in the sensor or its wiring circuit.
Can I fix F15 on my GE dishwasher myself?
Some causes of F15 are accessible to a knowledgeable DIYer. Inspecting the turbidity sensor harness for loose connections, checking the supply line for kinks, and cleaning a fouled sensor are all tasks that do not require specialized tools. Replacing the inlet valve or turbidity sensor involves some disassembly but is manageable with basic appliance repair experience. If the control board is suspected, professional diagnosis is recommended.
Is it safe to use my GE dishwasher when F15 is displayed?
You should not attempt to run a wash cycle while F15 is active. The fault indicates that water flow is not being confirmed, which means the dishwasher may not be filling or circulating water correctly. Running the machine in this state could result in incomplete cleaning, potential overheating of the pump, or failure to rinse dishes properly.
Will resetting my GE dishwasher clear the F15 error?
A reset may temporarily clear the F15 code, but it will return at the next cycle if the underlying problem is not corrected. To reset, disconnect power to the dishwasher for one to two minutes and restore it. If the fault reappears immediately or during the next run, a full diagnosis of the turbidity sensor, harness, and water supply is necessary.
How much does it cost to repair a GE dishwasher showing F15?
Repair costs depend on the failed component. A replacement turbidity sensor typically ranges from roughly 20 to 60 dollars for the part, while a water inlet valve generally falls in the 25 to 75 dollar range. If professional labor is required, total repair costs including diagnosis and installation can range from 100 to 250 dollars or more depending on your location and the specific fault found.

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