Miele Washer Error Code F4006

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.

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.

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.

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.

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.