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Error code reference

Miele Dishwasher Error Code F8

Water inlet fault

Miele codesMiele dishwasher codes

Water inlet fault – too few pulses at the end of the step.

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What F8 means on a Miele dishwasher

The F8 error code on a Miele dishwasher indicates a water inlet fault caused by insufficient pulse counts detected at the end of a fill step. Miele dishwashers use a flow meter (sometimes called a turbine or impeller sensor) positioned in the water inlet path to count pulses as water passes through. Each pulse corresponds to a measured volume of water entering the tub. When the control board counts fewer pulses than expected by the end of a programmed fill phase, it concludes that not enough water has entered and triggers the F8 fault.

The most common sources of this fault are restrictions or failures in the water supply path. A kinked inlet hose, a clogged inlet filter screen, or a partially closed supply valve can all reduce water flow enough to cause a low pulse count. The flow meter itself can also fail mechanically if the impeller becomes jammed with debris or fails electrically, sending no signal to the control board even when water is flowing normally. A faulty water inlet solenoid valve that does not open fully is another likely contributor.

Because this code is specifically tied to the pulse count at the end of a fill step rather than a complete absence of water, even marginal flow restrictions can trigger it. Technicians should check supply pressure at the connection point, inspect the inlet filter and hose for blockages or kinks, and test the flow meter for continuity and mechanical freedom before suspecting the control board or inlet valve solenoid.

Source: manufacturer service documentation.

Common causes of F8

  1. 01

    Clogged inlet filter screen

    Wiring / connection

    A fine mesh screen sits at the water inlet connection and can accumulate mineral deposits and sediment over time, restricting flow significantly. Remove the inlet hose at the back of the dishwasher and inspect the screen for debris or scale buildup.

  2. 02

    Kinked or restricted inlet hose

    Wiring / connection

    The water supply hose can become kinked if the dishwasher has been pushed too far back into the cabinet, reducing flow below the required level. Pull the unit forward and inspect the full length of the hose for bends or crushing.

  3. 03

    Low household water pressure or closed supply valve

    Wiring / connection

    Insufficient supply pressure or a partially closed shut-off valve under the sink can limit flow enough to generate too few pulses during the fill step. Verify the valve is fully open and check that supply pressure meets the dishwasher's minimum requirement.

  4. 04

    Failed or jammed flow meter

    Part replacement

    The flow meter uses a spinning impeller to generate pulse signals as water passes through it. If the impeller is jammed with debris or the sensor fails electrically, it will report fewer pulses than actually occurred, triggering F8. Inspect the flow meter for physical blockage and test its electrical output.

  5. 05

    Faulty water inlet solenoid valve

    Part replacement

    The inlet valve solenoid controls the opening of the water supply into the tub. A solenoid that does not open fully due to electrical failure or a worn valve seat will restrict flow and cause a low pulse count. Test the solenoid coil for correct resistance and check for adequate voltage at the valve during the fill cycle.

See the test procedure for each cause

Frequently asked questions about F8

What does F8 mean on a Miele dishwasher?
F8 indicates a water inlet fault where the dishwasher's flow meter detected too few pulses by the end of a fill step, meaning not enough water entered the tub. Miele dishwashers use a pulse-counting flow meter to measure water volume during filling, and when that count falls short of the expected value, the control board stops the cycle and displays F8. The fault can stem from supply restrictions, a clogged filter, a kinked hose, or a failing flow meter or inlet valve.
Can I fix F8 on my Miele dishwasher myself?
Some causes of F8 are straightforward DIY repairs. Checking and clearing a clogged inlet filter screen, straightening a kinked supply hose, and confirming the shut-off valve is fully open require no special tools or parts. However, replacing a flow meter or water inlet valve involves disconnecting water supply lines and electrical connectors, which is best handled by a technician if you are not comfortable with appliance repair.
Is it safe to keep using my dishwasher when F8 is showing?
The dishwasher will not complete a wash cycle while F8 is active, so continued use is effectively prevented until the fault is cleared. Running the machine in a faulted state is not recommended, as operating without adequate water could damage components like the wash pump. Diagnose and resolve the underlying cause before resuming normal use.
How much does it cost to repair a Miele dishwasher F8 error?
If the fault is caused by a blocked filter or a kinked hose, there may be no parts cost at all, just a service call fee ranging from around $80 to $150 depending on your location. Replacing a flow meter or inlet solenoid valve typically adds $50 to $200 in parts, with total repair costs commonly falling in the $150 to $400 range when labor is included. Miele parts tend to be priced at the higher end compared to other brands.
Will resetting my Miele dishwasher clear the F8 error code?
Resetting the dishwasher by canceling the program or cutting power may temporarily clear the displayed code, but F8 will return if the underlying water supply problem has not been corrected. A reset is useful for confirming whether the fault was a one-time event, such as a momentary pressure drop, or a consistent problem. If F8 reappears on the next fill cycle, proceed with a thorough diagnostic of the inlet system.

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