AquaStop — Water Leak Detected
The F70 error code means your Miele dishwasher's AquaStop flood-protection system has detected water where it should not be — usually in the base pan beneath the machine. The dishwasher immediately stops all water intake and activates the drain pump to prevent flooding.
~30%
DIY Fixable
$180-450
Typical Repair Cost
1-3 hrs
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. Do not continue using the dishwasher while F70 is active. The AquaStop system exists to prevent water damage — overriding or ignoring it risks flooding your kitchen and damaging cabinetry or flooring.
Can I reset the code?
Yes. Yes — but only after the base pan has been drained and the leak source identified. Turn off at mains for 10 minutes. If the code returns, the leak is still present.
When to stop immediately?
Stop if you notice: Water is actively pooling on the floor, The leak source is inside the machine and not accessible.
Symptoms You May Notice
Dishwasher stops immediately
The machine shuts down mid-cycle and will not restart
F70 flashes on the display
The error code appears and the Start/Stop button may blink
Water visible under the machine
You may notice moisture or a small puddle on the floor near the dishwasher
Drain pump runs continuously
You can hear the pump running even though no cycle is active — it is trying to evacuate the leaked water
Possible Causes
Loose or Damaged Hose Connection
The inlet hose, drain hose, or an internal hose clamp has come loose or cracked, allowing water to drip into the base pan.
DIY PossibleWorn Door Seal
The rubber gasket around the door has deteriorated, allowing water to seep out during the wash cycle and run down into the base.
Requires ProfessionalLeaking Sump or Pump Housing
The main sump assembly or drain pump housing has developed a crack or a failed seal, causing water to leak internally.
Requires ProfessionalFaulty AquaStop Valve
The solenoid valve in the AquaStop inlet hose has malfunctioned and is either stuck open or reporting a false alarm.
Requires ProfessionalBlocked or Overflowing Detergent Dispenser
Excess detergent or a cracked dispenser lid can direct water outside its normal path, eventually reaching the base pan.
DIY PossibleSafe Checks You Can Do
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1
Turn Off Water Supply
Immediately close the water shut-off valve (tap) that feeds the dishwasher. This prevents further water entering the machine.
The valve is usually under the kitchen sink — turn it clockwise to close.
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2
Check for Visible Leaks
Open the dishwasher door carefully. Look for water on the floor, under the door, and around the base. Mop up any standing water.
Place towels around the base before tilting the machine — water may spill from the base pan.
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3
Inspect the Door Seal
Run your hand along the rubber gasket around the door opening. Feel for tears, cracks, warping, or debris stuck in the seal that could prevent a tight closure.
A coin-sized piece of food or a small utensil caught in the seal is enough to cause a leak.
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4
Tilt and Drain the Base Pan
With the water supply off, carefully tilt the dishwasher forward about 15–20°. Water in the base pan will flow toward the drain pump and be evacuated. Let the pump run until it stops.
Have towels ready — some water may come out the front.
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5
Power Reset After Draining
Once the base pan is empty and no active leak is visible, turn off the machine at the mains for 10 minutes. Turn it back on and run a short cycle while watching closely for new leaks.
If F70 returns within minutes, the leak is active and needs professional attention.
When to Call a Professional
Contact a qualified Miele technician if:
- Water is leaking from the sump, pump, or internal hoses
- The door seal is visibly damaged or deformed
- F70 reappears after draining the base pan and resetting
- The AquaStop inlet hose valve clicks but does not open
- The dishwasher is under warranty — do not disassemble
Need Professional Help?
Find qualified Miele technicians in your area for proper diagnostics and repair.
Schedule Appointment