Kenmore Dishwasher Error Code F6E4

The F6E4 error code on a Kenmore dishwasher indicates that the float switch is reading an open circuit when it should be closed under normal operating conditions. The float switch is a safety component located at the bottom of the dishwasher tub. It consists of a physical float that rises when water accumulates in the base pan (the area beneath the tub) and a switch that signals the control board when water reaches an unsafe level. When the switch reads as open, the control board interprets this as a potential overfill condition and halts normal operation to prevent flooding.

There are three primary causes the control board associates with this fault. First, the float itself may be physically obstructed by a utensil, food debris, or other item that has fallen beneath the tub, holding the float in the raised position and keeping the switch open. Second, if the dishwasher is not sitting level, water can pool unevenly in the base pan and trigger or simulate an overfill condition. Third, a failed check valve on the drain hose can allow water to back-siphon into the base pan from the drain line, again raising the float and opening the switch.

Diagnosing the fault begins with clearing any obstruction from beneath the float and confirming it moves up and down freely. You should be able to hear an audible click from the switch contacts as the float moves through its range of motion. If the float moves freely and the click is absent, measure the switch resistance directly. A properly functioning closed switch should read near zero ohms of resistance, while an open or failed switch will read as infinite resistance (open circuit). Also verify that all four leveling legs are adjusted so the dishwasher sits flat.