My dishwasher keeps adding water and overflows

If the water lifts the float all the way up or the float is submerged, the water level is too high. Overfilling is likely a problem with the float or float switch. The float is located inside the dishwasher in the tub area. As water enters the tub, the float device will rise. When the float rises to a certain level it triggers the float switch, which in turn, turns off the water flow. In some dishwashers, the float switch is only used to prevent overfilling and the amount of water is regulated by the timer.

Before testing the float assembly, unplug the dishwasher or shut off the power at the fuse box or breaker panel to avoid an electrical shock hazard.



To inspect the float assembly, open the dishwasher and remove the bottom rack. Remove the float cover (if any; it can be identified by the fact that the cover does not move up and down). The cover may snap in place or it may be fastened in place with a screw.

Lift and drop the float several times. It should move freely. If the float sticks, it may prevent the dishwasher from filling or draining properly. Remove the float and look for obstructions that may interfere with its free movement. The float usually snaps in place. If it does not come off with a small force, it may have to be disconnected from the float switch first.

You will need to Replace the float and float cover, If you found no obstructions and the problem persists, test the float switch.

TESTING PROCEDURE



To access the float switch remove the lower panel located beneath the door. The panel is usually held in place with two screws either above or below the panel. It may be necessary to first open the door to the dishwasher to reach the screws over the panel, then close the door to remove the panel.

Note the location of the float in the dishwasher's tub and you will find the float switch beneath it in the access area. The switch has two wires connected to it. Label the wires and connections so that you can properly reconnect them later. The wires are connected with slip on connectors. Firmly pull the connectors off of the terminals. You may need to use a pair of needle-nose pliers to remove the connectors. Inspect the connectors and the terminals for corrosion. If either is corroded they should be cleaned or replaced.

Use a multimeter to test for continuity. Set the multimeter to the ohms setting X1. Touch one probe to each terminal. You should get a reading of either zero or infinity. With the probes still in place, depress the button or lever on the switch and the reading should change to the opposite extreme.

If the switch fails either test, it should be replaced.


NOTE_ If the float, and float switch check out ok, and there are no issues here, the culprit will be a faulty water inlet valve. replace the valve in this case.