Water is not draining from the sump within the allocated time.

• Check for a clogged drain filter or food particles jamming the non-return valve impeller.• Inspect the drain hose for kinks.• Measure resistance across the drain pump winding (normal: ~30-50 Ohms). Replace pump if open loop.

Miele dishwashers feature a hidden technician service menu that allows you to read stored fault codes, check operating hours, and test individual components like pumps and heaters. How to Enter Service Mode

: You can also search for manuals using your specific serial number on the Miele Australia 2. Accessing the "Secret" Service Menu

Inspect the heating element wires for burn marks or high-resistance degradation. F70: Float Switch / Water Protection System (WPS) Active

Remove the Torx T20 screws lining the interior perimeter of the stainless steel inner door panel. Note: Hold the outer door panel while removing the last two screws to prevent it from dropping.

Failed heater pressure switch, faulty circulation pump, or defective main control relay.

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Dirty water is remaining in the bottom of the tub at the end of a cycle.

If your machine is stuck running its drain pump due to an F70 error, you must drain the overflow pan to reset the float sensor. Pull the dishwasher out from its under-counter cavity.

Service manuals for the G 1220 focus heavily on alphanumeric fault codes displayed on the control panel. Error F12 Miele Dishwasher | How to Fix

Never use vinegar for cleaning; it is acidic and can lead to rust or leaks over time. Use a dedicated Miele multipurpose microfiber cloth and water instead.