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MIELE F18

Miele Dishwasher Error F18: Flow Meter Stationary — Insufficient Water Flow

Clear meaning, realistic next steps, and safe guidance without turning the page into a long repair manual.

What it means

The dishwasher's flow meter is reading zero or near-zero water flow when the machine expects water to be entering. The machine has stopped because it cannot confirm water is reaching the wash system.

Severity

Medium - some user checks may help, but repeated faults often need service.

Can you fix it yourself?

Partial — start with DIY steps

Most likely cause

Supply hose kinked — a bent hose can completely block flow to the flow meter

Estimated time for safe first checks: 10-15 min for hose and screen check; Professional if flow meter fails.

Step-by-Step DIY Fix Guide

  1. SAFETY: Disconnect power before checking hose connections.
  2. Trace the water supply hose from the shut-off tap to the dishwasher inlet — straighten any kinks.
  3. Turn off the water supply and disconnect the supply hose from the dishwasher inlet.
  4. Inspect and clean the mesh filter screen inside the inlet port — remove all scale and sediment.
  5. Reconnect the hose securely, turn the water supply back on, and check for drips.
  6. Plug in and run a test cycle — confirm the machine fills normally.
  7. If F18 persists after a clear hose and clean inlet screen, contact Miele service.

If it's still not filling correctly

  • If normal household water flow looks good but the code returns, the inlet-valve or fill-sensing path becomes more likely.
  • If the door closes normally but the warning keeps returning, the latch or switch path becomes more likely than a simple alignment issue.
  • F18 persists after inlet screen is clean and water pressure is confirmed adequate

What This Error Means

Error F18 on your Miele dishwasher means: The dishwasher's flow meter is reading zero or near-zero water flow when the machine expects water to be entering. The machine has stopped because it cannot confirm water is reaching the wash system. The dishwasher's self-diagnostic system has detected this condition and stopped or interrupted the current cycle.

The most frequent cause is supply hose kinked — a bent hose can completely block flow to the flow meter. Work through the causes and fix steps below in order — many Miele dishwasher errors can be resolved without a service call.

Many cases of F18 can be resolved by the homeowner. The steps below cover the full DIY checks — if they do not resolve the error, a Miele-certified technician is needed.

Most fill errors trace back to the water supply tap under the sink — it is often partially closed after a plumber visit or dishwasher installation. Confirm the tap is fully open before investigating anything further.

Most Likely Cause by Symptom

The Miele dishwasher may stop, pause, or refuse to complete the cycle normally.

Likely cause: Supply hose kinked — a bent hose can completely block flow to the flow meter

Check first: SAFETY: Disconnect power before checking hose connections.

Common Causes

  • Supply hose kinked — a bent hose can completely block flow to the flow meter
  • Inlet filter screen clogged — scale and sediment block the mesh screen at the hose connection
  • Household water pressure too low to open the inlet valve fully

What Not to Do

  • Do not force-start the dishwasher with F18 active — running the wash pump without water will damage the circulation pump

Model and Display Variation Notes

Model-family notes

  • Miele dishwasher display wording and code formats can vary by series.
  • If your model behaves differently, check the owner manual before trying any deeper maintenance step.

Display and panel differences

  • Panel wording can vary by series, so confirm the exact code pattern before buying parts.

Parts, Tools and Service Options

Common parts

  • Flow meter sensor if sensor has failed ($30-$70)
  • Water inlet valve if valve is not opening fully ($40-$100)

Manual and model check

Check your exact model and manual before ordering any Miele dishwasher parts.

Service option

Miele service visit if the warning returns after the basic checks are complete.

Suggestions in this section are organized to support the troubleshooting flow first. Any future affiliate relationships should be disclosed clearly.

When Not to Keep Troubleshooting

F18 persists after inlet screen is clean and water pressure is confirmed adequate

How to Prevent It Recurring

  • Inspect the inlet filter screen annually — gradual scale accumulation reduces flow without triggering an immediate error

Related Error Codes

Extra notes

  • This page is based on Miele support material and stays conservative where model-specific guidance may vary.
  • The goal is to help you identify safe first checks before you move into parts, service, or model-specific manual lookup.

Source and model notes

Last reviewed: 2026-04-09

Based on: Based on Miele support material and edited into consumer-safe guidance for the exact code family on this page.

View Miele USA Official Support

Model coverage note: Miele dishwasher code meanings can vary by series, control panel, and model family, so use this page as a safe starting point rather than a replacement for the model-specific manual.

Important: FixThisError is an independent guide, not the manufacturer. Use your model-specific manual when the panel wording or behavior differs.

Always disconnect power before inspecting appliances. If unsure, contact a licensed appliance technician.