Miele Dishwasher: drainage error

Professional Repair Guide

What is this symptom?

Experiencing a drainage error with your Miele Dishwasher? You might see error codes like F11 or F14, indicating a failure to remove water at the end of a cycle, leaving standing water in the tub. This issue is commonly caused by a clogged drain filter or improper installation, but can often be resolved with some DIY solutions.

Urgency: Medium

Important Tips for Miele Models

  • Error code F11/F14 specifically indicates drainage system faults; check filters and pump as described in Miele error code guides.

Possible Causes

Clogged drain filter or fine filter assembly

How to Identify: Water remains after wash; visible debris on filter; error code F11/F14

Part: Filter assembly (coarse and fine filters)

Improper installation (lack of high loop or air gap)

How to Identify: Hose routing under sink lacks high loop/air gap; water siphons back or fails to exit

Part: Drain hose routing

DIY Solutions

Clean drain filter assembly

Easy 10-20 minutes
Tools Needed: gloves, soft brush, warm water
  1. Turn off and disconnect power.
  2. Remove lower rack to access filter.
  3. Twist and lift out filter assembly.
  4. Rinse under running water and use brush to remove debris.
  5. Reinstall filter and run a short drain cycle.
⚠️ Safety First: Ensure power is off before reaching into dishwasher

Inspect and clear drain hose

Moderate 20-40 minutes
Tools Needed: screwdriver, bucket, flashlight
  1. Turn off dishwasher and water supply.
  2. Locate drain hose under sink and detach carefully.
  3. Look through hose for blockages with flashlight.
  4. Use gentle water flow or long flexible brush to clear debris.
  5. Reattach hose ensuring no kinks and proper routing with high loop/air gap.
⚠️ Safety First: Have a bucket ready; avoid sharp tools that can puncture hose

Remove foreign objects from drain pump/non-return valve

Advanced 30-60 minutes
Tools Needed: screwdriver, pliers, towels
  1. Disconnect power.
  2. Remove bottom access panel.
  3. Locate and open non-return valve and drain pump area.
  4. Remove visible debris blocking impeller or valve.
  5. Reassemble and test drain cycle.
⚠️ Safety First: Risk of injury from sharp debris; disconnect power first

Next step

Choose the next step for drainage error

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Other parts options

Check related components first; use model search as a fallback.

Possible related component

Drain Hose

Carries waste water from the drain pump to your home's standpipe or sink drain.

$15 - $30 · Easy · 15-30 mins

Check fit & price
Model number required

Model-compatible Dishwasher parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

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Optional routine care

Maintenance supplies

These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.

Maintenance supply

Dishwasher Cleaner and Descaler

Supports routine removal of mineral scale, grease, and odor. It is maintenance, not a repair for a failed pump, valve, or control.

View maintenance supply
Maintenance supply

Braided Dishwasher Inlet Hose

For replacement of an externally damaged supply hose. Verify connection size, length, and appliance installation requirements before ordering.

View maintenance supply

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.

Professional Repairs

Drain pump replacement

Estimated Cost: $150 - $300

Internal control or sensor repair

Estimated Cost: $200 - $500

When to Call a Professional

If pump cleaning does not restore drainage
If you encounter electrical faults or error codes persist after cleaning

Preventive Maintenance

  • Clean filter assembly: Drain blockages and drainage errors
    Frequency: monthly
  • Check drain hose routing and inspect for kinks: Improper drainage and siphoning issues
    Frequency: quarterly

Frequently Asked Questions

Why is my Miele Dishwasher drainage error?
Common causes include a clogged drain filter or improper installation such as lack of a high loop or air gap.
How do I fix Miele Dishwasher drainage error myself?
You can clean the drain filter, inspect and clear the drain hose, or remove foreign objects from the drain pump.
How much does it cost to fix drainage error?
Professional repairs can range from $150 to $500 depending on the issue.
When should I call a technician for drainage error?
Call a technician if DIY solutions don't resolve the issue or if you're uncomfortable with advanced repairs.

References & Sources

Community Analytical Insights

Guidance from available sources; statistical claims are shown only for samples of at least 10 discussions

Common Issues Reported by Users

  • Clogged drain filter or hose
  • Faulty drain pump
  • Blocked air gap or kitchen sink drain

User Suggested Solutions

  1. Check and clean the drain filter and hose. Open the dishwasher door, remove the bottom rack, and take out the filter. Rinse it under warm water to remove debris. Inspect the drain hose for any kinks or blockages and clear them if necessary.

  2. Test the drain pump for functionality. Access the pump by removing the lower spray arm and cover. Check for any obstructions in the pump impeller and ensure it spins freely. If the pump is not functioning, it may need to be replaced.

  3. Inspect the air gap and kitchen sink drain for blockages. Remove the air gap cover and clean it if necessary. If the sink drain is clogged, use a plunger or drain cleaner to clear it.

Limited-source guidance; percentages and success-rate claims are not shown
View Sources

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

  1. Miele G6820 dishwasher: strange drainage error (Help needed)

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