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Error code reference

GE Dishwasher Error Code F49

Turbidity sensor reading low (possible short on sensor).

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Turbidity sensor reading low (possible short on sensor).

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  • Step-by-step tests with expected resistance, voltage, and continuity values
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  • Verified part numbers when replacement is required
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What F49 means on a GE dishwasher

F49 on a GE dishwasher indicates the control board has detected a low signal from the turbidity sensor. The turbidity sensor measures water clarity during the wash cycle, allowing the control board to adjust cycle length and water usage based on how dirty the water is. A 'low' reading means the sensor output fell below the expected minimum threshold. However, GE has flagged this specific fault as unused in the current control logic, meaning the code is logged but the dishwasher does not act on it.

For a homeowner, this error simply means a sensor that monitors how dirty your wash water is reported an unusually low reading. Despite this, GE's engineering has designated F49 as a non-actionable fault. The dishwasher does not use this sensor reading to alter its operation in a meaningful way that would affect your dishes or the machine's function.

Because GE explicitly marks this fault as 'not used, ignore fault,' no repair or diagnostic action is required. The dishwasher will continue to operate normally. You do not need to replace the turbidity sensor or any other component based on this code alone. Clearing the fault code from memory is the only reasonable step.

Source: manufacturer service documentation.

Common causes of F49

  1. 01

    Turbidity sensor signal drop below minimum threshold

    Wiring / connection

    The turbidity sensor briefly output a voltage or resistance reading below what the control board expects as a valid low-end signal. This can happen due to minor sensor fluctuation and does not indicate a failed component in this context.

  2. 02

    Control board logging residual or ghost fault

    Wiring / connection

    Some GE control boards store fault codes from transient conditions during power fluctuations or cycle interruptions. The F49 may have been logged during an abnormal shutdown rather than a true sensor failure.

  3. 03

    Turbidity sensor with intermittent output

    Part replacement

    Although F49 is flagged as unused, a turbidity sensor that is failing internally may generate erratic low readings that trigger the code. This does not require action unless other wash performance problems are present.

See the test procedure for each cause

Frequently asked questions about F49

What does F49 mean on a GE dishwasher?
F49 means the control board detected a low signal from the turbidity sensor, which measures how dirty the wash water is. GE has designated this fault as unused, meaning the dishwasher's control system does not take any corrective action based on this reading. No repair is needed based on this code alone.
Can I still use my GE dishwasher with the F49 error code showing?
Yes, you can continue using your dishwasher normally. GE explicitly marks F49 as a non-actionable fault to be ignored. The dishwasher will run its cycles without any degradation in function caused by this code. If wash performance seems poor, investigate other potential causes unrelated to F49.
How do I fix F49 on a GE dishwasher?
No fix is required. GE's service documentation for F49 states the fault is not used and should be ignored. You can clear the error code by cutting power to the dishwasher at the circuit breaker for 30 seconds and restoring it. If the code returns repeatedly and you notice actual wash quality problems, a turbidity sensor test would be the next step.
How much does it cost to repair a GE dishwasher F49 error?
Repairing F49 costs nothing because no repair is needed. GE designates this as an ignored fault. If you choose to replace the turbidity sensor anyway, the part typically costs between $20 and $60, and installation is a moderate DIY task requiring disassembly of the lower dishwasher interior. A technician visit to perform this would generally cost $100 to $200 in labor.
Do I need to replace the turbidity sensor to clear the F49 code on my GE dishwasher?
No. Replacing the turbidity sensor is not necessary to address F49. The code can be cleared by cycling power to the dishwasher. Since GE marks this fault as unused and non-actionable, replacing the sensor would not resolve anything and is not a recommended step unless separate diagnostic testing confirms the sensor is faulty and affecting wash performance.

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