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Miele Dishwasher Error Code F78

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: June 14, 2026
⚠ High Severity 👨‍🔧 Call a Pro

Circulation pump / frequency converter fault

The control detected a fault driving the circulation pump (the pump that sprays water through the arms during the wash), often reported by its frequency converter, so the program stops with F78 and dishes are left unwashed. A blocked or jammed pump impeller, a wiring fault, or a failed converter/pump are the usual causes.

💰 DIY cost: $0–$0 👨‍🔧 Pro cost: $250–$500 Save $250+ by doing it yourself
Miele Dishwasher error code F78 on the display panel
How the F78 code appears on a Miele dishwasher display

What Does Error Code F78 Mean on a Miele Dishwasher?

Circulation pump / frequency converter fault.

The control detected a fault driving the circulation pump (the pump that sprays water through the arms during the wash), often reported by its frequency converter, so the program stops with F78 and dishes are left unwashed. A blocked or jammed pump impeller, a wiring fault, or a failed converter/pump are the usual causes.

What Causes Error Code F78?

Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:

  1. 1
    Circulation pump impeller jammed by debris 40% of cases
  2. 2
    Frequency converter/pump electronics fault 35% of cases
  3. 3
    Wiring to the pump damaged 25% of cases

How to Fix Miele Dishwasher Error Code F78

👨‍🔧 Call a Pro Est. time: 1–3 hours
⚡ Safety first: Unplug the appliance before opening any panels or touching internal components.
  1. 1

    Clear debris from the sump

    Remove the filters and check the sump and spray-arm feed for glass, seeds, or labels.

  2. 2

    Power cycle

    Switch off at the unit for several minutes to clear a transient drive fault.

  3. 3

    Replace the circulation pump

    If the impeller is jammed/failed or the converter is faulty, the pump needs replacement.

    🔩 Miele circulation pump ($120–$250)

How to Reset Error Code F78

Clear the sump and switch off several minutes. If F78 persists, the circulation pump needs service.

Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.

Did this guide fix your appliance?

When to Call a Professional

Circulation pump replacement on Miele dishwashers is a sealed-system job for authorized service.

Average professional repair cost for this issue: $250–$500

Related Error Codes

F11
Drainage fault — water not pumped out
⚠ High Severity

Find Replacement Parts

Use these links to find the exact replacement parts for your Miele Dishwasher:

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Search PartSelect
Miele Dishwasher repair parts
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Search RepairClinic
Step-by-step video guides

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More Miele Dishwasher Error Codes

F13 Water intake fault — dishwasher not filling F15 Heating issue — water not heating to target temperature F70 Flow meter fault — water quantity sensor failure F12 Water intake fault at the start of a step F14 Heater pressure switch fault F24 Heating circuit fault — heater relay or temperature sensor

Frequently Asked Questions

What does error code F78 mean on a Miele Dishwasher? +
Circulation pump / frequency converter fault
How do I fix error code F78 on my Miele Dishwasher? +
Start by Remove the filters and check the sump and spray-arm feed for glass, seeds, or labels.. If that doesn't resolve it, work through each step in the fix guide above.
How do I clear or reset error code F78? +
Clear the sump and switch off several minutes. If F78 persists, the circulation pump needs service.
Is error code F78 serious? +
This is a high-severity error. You should address it soon. Running the appliance may cause further damage.

Sources & References

Content verified against manufacturer service documentation. Last verified: June 14, 2026.

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