Maytag Dishwasher Error Code 6-4

The 6-4 code means the float switch is reading an open circuit, indicating an overfill condition. The dishwasher has stopped operation as a safety measure to prevent water from overflowing. The cause can range from a simple obstruction under the float to a failed fill valve or a shorted component on the control board. Checking the float for obstructions and verifying the dishwasher is level are the recommended first steps.

It is not recommended to continue running the dishwasher while this code is active. The 6-4 code can indicate a genuine overfill condition caused by a stuck fill valve or shorted control component, either of which could allow water to overflow onto your floor. The machine stops itself for this reason, and the underlying cause should be diagnosed before running another cycle.

If the fix is simply removing a blockage from the float or adjusting the leveling legs, there is no parts cost involved. Replacing a drain hose check valve is generally an inexpensive repair, typically in the range of $10 to $40 for the part. A failed water inlet valve usually costs between $25 and $80 for the part, while a replacement control board is the most expensive possibility, often ranging from $100 to $250 or more depending on the model. Labor costs vary by region if a technician is required.

Start by opening the dishwasher and locating the float, typically a small plastic dome at the front corner of the tub floor. Remove any debris or items lodged underneath it and confirm it moves freely and clicks when pressed. Next, check that the dishwasher is sitting level and adjust the legs if needed. If the tub contains standing water or these steps do not resolve the error, the drain check valve, fill valve, or control board will need further testing.

A reset may temporarily clear the code, but if the underlying problem has not been resolved, the error will return during the next fill cycle. A reset is only useful as a confirmation step after you have corrected the issue, such as removing a float obstruction or re-leveling the appliance. Do not rely on repeated resets to keep the machine running if the root cause has not been addressed.