Miele Dishwasher F70 Error Code: Causes & Fix

What is the Miele Dishwasher F70 error?#

F70 on a Miele dishwasher means the leak-protection system has tripped: a float switch in the base tray has detected water pooling under the machine, so it shuts down and often runs the drain pump to protect your floor. This one deserves prompt attention — it is telling you water is escaping somewhere. Before anything else, stop the cycle, and if you can, pull the machine out to look for the source of the leak in the base.

F70 on a Miele Dishwasher: likely causes and repair cost#

On a Miele Dishwasher, the F70 code signals: leak detected / float switch activated.

Typical professional repair: $250–$550 · Difficulty: hard · usually a technician job

Symptoms that often accompany F70: Water visible under dishwasher; Machine stops mid-cycle; Drain pump runs continuously

Technician diagnostic sequence for F70:

1. Tilt the dishwasher back slightly to check for water in the base tray
2. If water is found, sponge it out and inspect all hose connections
3. Check the door seal (gasket) for tears, cracks, or food debris
4. Inspect the spray arm seals and sump gasket
5. Check for leaks at the water inlet and drain connections

Parts a technician may check or replace: Door seal gasket; Base tray float switch; Hose clamps; Sump gasket

Field note: Miele Waterproof System uses a float switch in the base tray. Even a few tablespoons of water will trigger F70. After clearing water, run a short cycle and watch the base tray — the leak source may be very small.

Safety note: F70 engages the Waterproof System safety shutoff. The dishwasher will not operate until the base tray is completely dry and the float switch resets. Do not override.

How to troubleshoot the F70 error yourself#

Because F70 is a genuine water-detection code, safety and finding the source come first. First, turn the machine off and close the supply stopcock, then check the base tray and under the unit for standing water. Second, inspect the likely origins from the table above: a hose connection weeping at a clamp, a tired door seal letting wash water escape at the front, or a leak into the base tray from the sump area. Tightening a loose hose clamp or reseating a dislodged door seal is within a careful owner's reach. Third, dry the base tray fully so the float resets. Where you must stop is any leak you cannot see or reach, or a float switch that trips with no water present — confirming the base-tray float and tracing an internal leak is a technician job, rated hard, and running the machine while it leaks risks water damage.

Is the Miele Dishwasher F70 error worth fixing?#

Worth fixing, and worth doing quickly. Some F70 causes — a loose hose clamp or a replaceable door seal — are inexpensive or DIY. When a technician must trace an internal leak and replace the base-tray float or gaskets, the repair runs $250–$550, comfortably under half the price of a new Miele. Because a persistent leak can damage cabinetry and flooring, the case for repairing promptly is even stronger than the parts cost alone; I would not leave an F70 unresolved.

Miele Dishwasher F70: frequently asked questions#

What does F70 mean on a Miele dishwasher?#

It means the leak-protection float in the base tray has detected water, so the machine shuts down and pumps out to prevent a leak from spreading.

Is it safe to keep using a dishwasher with F70?#

No — F70 signals an active or detected leak. Stop the machine, close the water supply, and find the source before running it again to avoid water damage.

Can I clear F70 myself?#

Sometimes. Tightening a loose hose clamp, reseating a door seal, and drying the base tray can clear it. An unseen internal leak or a faulty float needs a technician.

How much does F70 repair cost?#

Inexpensive or DIY for a hose clamp or door seal. Tracing an internal leak and replacing the base-tray float or gaskets runs $250–$550 professionally.

Which parts fail when a dishwasher shows F70?#

Commonly the door seal, a hose connection, or a sump gasket. The base-tray float switch itself can also fault and trip without real water present.

Why does a base-tray leak trigger F70?#

Water reaching the base tray lifts the float switch, which the board reads as a leak. It shuts the machine down and drains to keep the water from spreading.