Miele Dishwasher Error Code F70

F70 means the overflow float switch B8/3, located in the drip pan at the base of the dishwasher, has detected standing water from an internal leak. The control board responds by running the drain pump continuously, even when the machine is switched off, as a protective measure. The error will persist until the leak source is identified and repaired and the drip pan is cleared of water.

No, you should not continue running the dishwasher while F70 is active. There is an active internal leak, and continued operation could worsen the leak, cause water damage to cabinetry or flooring, or create an electrical hazard. The dishwasher should remain off until the leak is found and corrected.

Repair costs vary depending on the leak source. A simple hose reclamp or connection reseat might cost relatively little if done without parts, while replacing a door gasket typically runs in the range of $50 to $150 in parts and labor. More involved repairs such as pump seal replacement or inlet valve replacement can range from $150 to $400 or more, depending on parts and the technician's labor rate in your area.

Some homeowners can resolve F70 by pulling the dishwasher out, mopping up the water in the drip pan, and identifying an obvious loose hose or connection that can be reseated or tightened. However, if the leak source involves the pump seals, internal hose assemblies, or a failed float switch, a qualified technician with the right tools and parts will be needed to complete the repair safely.

A simple reset will not permanently clear F70 because the drain pump is designed to keep running as long as water is present in the drip pan and the float switch remains activated. Even if the display resets momentarily, the code will return until the drip pan is emptied and the underlying leak is repaired. Addressing only the symptom without fixing the leak source will not resolve the fault.