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Error code reference

Miele Washer Error Code F4006

Control has intervened in last program sequence and limited water level.

Miele codesMiele washer codes

Control has intervened in last program sequence and limited water level.

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What F4006 means on a Miele washer

F4006 on a Miele washer indicates that the control unit actively intervened during the last program sequence and imposed a restriction on the water fill level. Rather than allowing the cycle to proceed with the intended water volume, the machine's control logic detected a condition that prompted it to cap the water level below the programmed target. This is a protective intervention, meaning the washer completed or attempted to complete the cycle, but under modified operating conditions.

The control unit continuously monitors inputs from the pressure sensor (also called the pressure switch or water level sensor) throughout each wash program. When the sensed water level rises faster than expected, fails to stabilize at the target level, or the pressure sensor sends readings outside the expected parameters, the control interprets this as a potential overfill risk and intervenes. The intervention is logged as F4006 to alert the technician that the cycle was not executed under normal conditions.

Common contributors to this fault include a faulty or drifting pressure sensor that reports incorrect water levels to the control board, a partially blocked pressure chamber hose affecting sensor accuracy, a fill valve that does not close promptly on command, or a slow drain condition that causes residual water to skew the fill readings. Because the control intervened rather than shutting down entirely, the fault often points to a borderline condition rather than a complete component failure, making careful diagnostic testing of the pressure sensing system the logical starting point.

Source: manufacturer service documentation.

Common causes of F4006

  1. 01

    Faulty or drifting pressure sensor

    Part replacement

    The pressure sensor (water level sensor) may be sending inaccurate readings to the control board, causing it to perceive an overfill condition even when the actual water level is correct. Testing the sensor's output against known water levels can confirm a drift or failure.

  2. 02

    Blocked or kinked pressure chamber hose

    Wiring / connection

    The small hose connecting the drum pressure chamber to the pressure sensor can become clogged with detergent residue or kinked, causing false pressure readings. Inspect the hose for blockages, kinks, or cracks and clear or replace it as needed.

  3. 03

    Fill valve not closing fully

    Part replacement

    A fill valve that is slow to close or leaks past its seal will allow water to continue entering the drum after the control has signaled it to stop, triggering a protective water level limit. Check the valve for debris on the screen and proper electrical shutoff response.

  4. 04

    Slow or incomplete drain leaving residual water

    Wiring / connection

    If residual water from a previous cycle remains in the drum, the pressure sensor will read a higher starting water level and the control may intervene to prevent overfill. Inspect the drain pump filter, drain hose routing, and pump operation for any restriction.

  5. 05

    Control board fault

    Part replacement

    In less common cases, the control board itself may misinterpret valid pressure sensor signals and intervene unnecessarily. This is typically considered after the pressure sensing system and fill valve have been tested and confirmed serviceable.

See the test procedure for each cause

Frequently asked questions about F4006

What does F4006 mean on a Miele washer?
F4006 means the washer's control unit detected a condition during the last program that caused it to limit the water fill level as a protective measure. The cycle ran, but not at the intended water volume. The fault is logged to alert you that the water level sensing system or fill control should be inspected before running additional cycles.
Can I fix F4006 myself, or do I need a technician?
Some contributing factors, such as a blocked pressure hose or a clogged drain pump filter, can be inspected and cleared by a knowledgeable DIYer. However, testing the pressure sensor's accuracy and verifying fill valve operation typically requires a multimeter and familiarity with appliance diagnostics. If you are not comfortable working with these components, a qualified appliance technician is the safer option.
Is it safe to keep using my Miele washer with F4006 showing?
The fault indicates the machine already intervened to prevent a potential overfill, so continuing to run loads without diagnosing the root cause carries some risk of water damage if the underlying condition worsens. It is best to identify and address the cause before relying on the washer for regular use.
Will resetting the washer clear the F4006 error?
Resetting the washer may clear the displayed fault code, but it will not resolve the underlying condition that caused the control to intervene. If the same condition is present during the next cycle, the control will intervene again and the fault will return. A reset alone is not a fix.
How much does it cost to repair a Miele washer with F4006?
Repair costs vary depending on the failed component. Clearing a blocked pressure hose or drain filter involves minimal cost if done without a service call. Replacing a pressure sensor typically runs in the range of $80 to $180 including parts and labor. A fill valve replacement generally falls between $100 and $220. Control board replacement, if required, is the most expensive scenario and can range from $250 to $500 or more depending on the model and labor rates in your area.

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