Miele Washer Error Code F4155

F4155 indicates a drainage fault detected during the spin cycle. The washer's control board monitors water level continuously, and when it registers an increase of 50 mm water column or more during spinning, it halts the spin cycle. This means water is not draining properly when it should be, pointing to a blockage or component failure in the drain system.

No, you should not continue running the washer while this fault is active. The machine has stopped the spin cycle because it detected water rising when it should not be. Running further cycles risks water remaining in the drum, potential overflow, and additional stress on the drain pump. Resolve the drainage issue before resuming use.

If the fix is simply cleaning a clogged drain filter, the cost is minimal, typically just your time or a small service call fee. If the drain pump needs replacement, parts and labor can range from around 150 to 350 dollars or more depending on your location and service provider. A faulty pressure sensor is generally on the lower end of parts cost, but diagnostic labor fees will apply regardless of the component replaced.

In many cases, yes. Start by cleaning the drain pump filter, which is accessible behind the front lower panel, and inspect the drain hose for kinks or blockages. If the filter and hose are clear, the issue may involve the drain pump or pressure sensor, which typically require more technical skill and possibly replacement parts. If basic checks do not resolve the fault, a qualified technician should inspect the pump and pressure sensor.

A reset may temporarily clear the displayed fault code, but it will not resolve the underlying drainage problem. If the cause of the water level increase is not corrected, the fault will return as soon as the washer reaches the spin cycle again. Address the drain filter, hose, pump, and pressure sensor before attempting a reset.