Miele Dishwasher: valve failure

Professional Repair Guide

What is this symptom?

Experiencing water inlet-related error codes like F12, F18, or F19 on your Miele dishwasher? This indicates a valve failure, which may cause insufficient water entry, slow filling, or leaks. Identifying and resolving the issue promptly can restore optimal performance to your appliance.

Urgency: Medium

Important Tips for Miele Models

  • Miele error codes like F12 (water inlet problem) and F18/F19 (flow meter/water intake irregularities) commonly relate to inlet valve or flow components.

Possible Causes

Failed or clogged water inlet (solenoid) valve

How to Identify: Dishwasher does not fill with water at start of cycle, fills very slowly, or fills uncontrollably; error codes like F12, F18/F19 related to water intake/flow; unusual humming or buzzing during fill stage indicating valve stuck or malfunctioning.

Part: Water inlet valve / Magnetventil

DIY Solutions

Clean inlet screen and check hoses

Moderate 20–40 minutes
Tools Needed: screwdriver, towel, bucket
  1. Turn off dishwasher power and water supply.
  2. Locate the inlet valve (behind lower access panel) and disconnect hose.
  3. Remove and inspect inlet screen for debris; rinse with water.
  4. Straighten or replace kinked supply hose.
  5. Reconnect components and test a short cycle.
⚠️ Safety First: Always disconnect power and water before accessing valves to avoid shocks or flooding.

Basic inlet valve visual check

Easy 10–15 minutes
Tools Needed: flashlight
  1. Turn off dishwasher and water supply.
  2. Remove lower kick plate to visually inspect inlet valve area.
  3. Look for visible cracks, mineral buildup, or leaks around valve.
  4. If debris visible on inlet screen, try cleaning as above.
⚠️ Safety First: Disconnect power first.

Professional Repairs

Replace water inlet valve assembly

Estimated Cost: $50–$200 (part) + labor

Adjust or repair supply plumbing for low pressure

Estimated Cost: $100–$300

When to Call a Professional

Dishwasher continues to display inlet/water flow error codes after DIY checks
Signs of leaks under or around dishwasher when valve is suspected
Electrical testing of solenoid requires specialized tools

Preventive Maintenance

  • Clean inlet filter and screens: Debris buildup causing inlet valve restrictions
    Frequency: every 6 months
  • Inspect water supply hose: Kinks or degradation restricting water flow affecting inlet performance
    Frequency: annually

Frequently Asked Questions

Why is my Miele Dishwasher valve failure?
Common causes include a failed or clogged water inlet valve, leading to error codes and filling issues.
How do I fix Miele Dishwasher valve failure myself?
Turn off power and water, then clean the inlet screen and check hoses for clogs.
How much does it cost to fix valve failure?
Replacing the water inlet valve costs $50–$200 for the part plus labor fees.
When should I call a technician for valve failure?
If DIY solutions don't resolve the issue or if plumbing adjustments are needed, consult a professional.

References & Sources

Community Analytical Insights

Analysis based on real user discussions from appliance repair communities

Can I Fix This Myself?

75%
DIY Success Rate Difficulty: Either

Common Issues Reported by Users

  • Faulty intake drain valve due to wear and tear
  • Clogged valve due to debris or mineral buildup
  • Electrical issues affecting valve operation (e.g., faulty wiring or control board malfunction)

User Suggested Solutions

  1. Inspect and replace the intake drain valve. First, disconnect the power supply and water supply. Remove the lower spray arm and filter to access the valve. Disconnect the old valve, install the new one, and reassemble the dishwasher. Test for leaks and proper operation.

  2. Clean the intake drain valve. Disconnect the power and water supply, remove the valve, and clean it thoroughly with vinegar or a suitable cleaning agent to remove any debris or mineral buildup. Reassemble and test the dishwasher.

  3. Check electrical connections and control board. Inspect wiring for any damage or loose connections. If necessary, consult the wiring diagram to troubleshoot the control board. This may require professional assistance if issues are found.

Analysis based on 1 community discussions
View Sources

Data compiled from real discussions on r/appliancerepair and r/Appliances:

  1. Do new Miele dishwashers have the same old prone-to-failure ...

Community Discussions

prone-to-failure intake drain valves

Replacement of the intake drain valve can be done DIY for about $30, with videos available for guidance.

DIY View on Reddit →

Source: Reddit r/appliancerepair

User Comments (0)

Share your experience or solution below.

Be the first to comment!