Washer Medium Severity
F15 Miele Error Code

Hot Water Intake Fault

The F15 error code means the hot water inlet valve on your Miele washing machine is not receiving or supplying hot water as expected. This code applies to models connected to a separate hot water supply.

~55%

DIY Fixable

$80-250

Typical Repair Cost

15 min – 1 hr

Pro Repair Time

Quick Assessment

Answer to continue safely

Is it safe to keep using?

Yes. The machine can still wash using cold water with its internal heater. F15 reduces efficiency but does not prevent operation. It is safe to use while troubleshooting.

Can I reset the code?

Yes. Yes. Check the hot water supply first, then reset at mains for 5 minutes.

When to stop immediately?

Stop if you notice: The hot water inlet valve leaks, F15 appears with other intake codes.

Symptoms You May Notice

Machine uses only cold water

The hot water inlet is not working, so only cold water enters

Longer heating times

The machine's internal heater must heat from cold instead of using pre-heated water

F15 at cycle start

The code appears when the hot water valve is commanded to open

Higher energy consumption

Heating from cold uses more electricity

Possible Causes

1

Hot Water Tap Closed

The separate hot water shut-off valve is not open.

DIY Possible
2

Hot Water Supply Not Available

Your household hot water heater is off, empty, or set too low.

DIY Possible
3

Blocked Hot Water Inlet Filter

Sediment has clogged the hot water inlet mesh filter.

DIY Possible
4

Faulty Hot Water Inlet Valve

The hot water solenoid valve has failed.

Requires Professional
5

Incorrect Plumbing Connection

The hot and cold water hoses are swapped or the hot connection is missing.

DIY Possible

Safe Checks You Can Do

These checks are safe for homeowners. No disassembly required. Do not remove panels or access internal components.
  1. 1

    Check the Hot Water Tap

    Locate the hot water shut-off valve and make sure it is fully open.

    Some Miele washers have two inlet connections — hot and cold. Verify both are connected and open.

  2. 2

    Test Hot Water at a Tap

    Run the hot water at a nearby tap. If it is cold, the issue is your water heater, not the machine.

    Wait for the water to turn hot — if your heater is far away, it may take a minute.

  3. 3

    Clean the Hot Water Inlet Filter

    Turn off hot water. Unscrew the hot water hose from the machine. Clean the mesh filter.

    Hot water lines often carry more sediment than cold.

    Tools required
  4. 4

    Verify Hose Connections

    Ensure the hot water hose connects to the hot water inlet on the machine (usually marked red or H).

    Swapped connections are a common setup error.

  5. 5

    Power Reset

    Turn off at mains for 5 minutes. If the valve had a temporary glitch, a reset may restore it.

    After reset, run a hot cycle and check if hot water enters.

When to Call a Professional

Contact a qualified Miele technician if:

  • Hot water valve does not click/open
  • F15 persists with confirmed hot water supply
  • Valve leaks when activated
  • Under warranty

Need Professional Help?

Find qualified Miele technicians in your area for proper diagnostics and repair.

Schedule Appointment

More Washer Error Codes

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F138 F103 F62 F56 F53 F50 F46 F43 F35 F34 F29 F20