A dishwasher may start foaming for several different reasons, but the most common reason is from the use of wrong products. If you used dish soap like you normally use in the sink instead of a cleaning products made specifically for a dishwasher, you can fix the problem quickly. Follow the steps below.
How to Fix a Foaming Dishwasher
Stop the washing cycle and open the dishwasher.
Pour approximately 1 1/2 cups of regular table salt inside the bottom of the dishwasher. The salt will aid in the removal of the suds.
Close the dishwasher and run a rinse cycle. Rinsing the dishes is the only way to remove the suds. The salt should prevent the dishwasher from continuing to foam. However, if the dishwasher does continue to foam, place a towel under the dishwasher to catch the bubbles. Once the rinse cycle is complete, the foaming should no longer be present.
Run the wash cycle again using dishwasher-only products. If the foaming is still persistent, you may need to check your drain hose to make sure nothing has blocked it.