F7
Whirlpool Dishwasher
Severity: ModerateWhat Does This Error Mean?
The F7 error means the flow meter (water flow sensor) in your Whirlpool dishwasher is not reading correctly. The flow meter measures how much water is entering the dishwasher during the fill cycle. If the reading is zero or out of range, the dishwasher stops to prevent running without water.
Affected Models
- WDT750SAHZ
- WDF520PADM
- WDT970SAHZ
- WDTA50SAHZ
- Most Whirlpool built-in dishwashers
Common Causes
- The flow meter sensor has failed or is stuck and cannot spin freely
- Mineral scale or debris is blocking the flow meter's turbine wheel
- The wiring harness connection to the flow meter is loose or corroded
- Low water pressure is causing insufficient flow through the meter
- The water inlet valve is partially failing, reducing the flow rate
How to Fix It
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Turn off and unplug the dishwasher.
Always disconnect power before working on any dishwasher components.
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Locate the flow meter — it is typically on the water inlet line inside the dishwasher, near the base.
You may need to remove the kick plate and partially pull out the dishwasher to access it.
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Remove the flow meter and inspect the small turbine wheel inside.
Mineral deposits or debris can prevent the turbine from spinning. Rinse it under running water and use a toothpick to clear any buildup.
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Reinstall the cleaned flow meter, restore power, and run a fill cycle.
If the turbine spins freely after cleaning, F7 should clear.
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If F7 returns after cleaning, replace the flow meter sensor.
The part costs $30–$70. Make sure the water supply pressure meets the minimum requirement (20 PSI) before ordering.
When to Call a Professional
If cleaning the flow meter does not resolve F7, the sensor itself may need replacement. Flow meter assemblies cost $30–$70. A technician can also verify whether low water pressure or the inlet valve is contributing to the problem.
Frequently Asked Questions
What is a flow meter and why does a dishwasher need one?
A flow meter is a small sensor with a spinning turbine wheel inside. As water passes through it, the wheel spins and generates a signal the control board counts. This tells the dishwasher exactly how much water has entered — more accurate than a timer or float.
Can hard water deposits cause the F7 error?
Yes. Mineral scale from hard water is a common cause of flow meter failure. The deposits coat the turbine wheel and prevent it from spinning. Cleaning the meter with white vinegar can help dissolve mineral buildup.
Is F7 related to F6 on a Whirlpool dishwasher?
They are related but not the same. F6 means the dishwasher did not reach the required water level. F7 means the flow sensor is not detecting water movement. Both can be caused by a faulty inlet valve or low water pressure.