The Drainage Is Not Working in My Dishwasher

How a Dishwasher Drain System Works

• A dishwasher drain connects to a corrugated tube that directs water to the kitchen sink drain. The air gap next to the sink faucet creates suction in the drain line and prevents water from backing up into the dishwasher tub in the event of a clog.

Why the Water Won't Drain

• Large debris or food particles caught in the drain opening or a bent or damaged hose can cause water to remain in the dishwasher tub at the end of the cycle. Further down the line, a clog in the kitchen drain or air gap forces water back into the tub instead of through the drain system. Excessive suds caused by too much detergent, the wrong type of detergent or soft water can also prevent water from draining during the rinse cycle.

How to Fix the Problem

• Reach into the back of the tub and remove any debris from the drain opening. Use a drain cleaning liquid according to the package directions to clear any blockages in the sink drain. Pull out the air gap, unclog it then rinse and replace it. Examine the corrugated drain hose that runs from the dishwasher to the sink drain. Straighten the hose and replace it if it's worn or damaged.

How to Prevent the Problem from Recurring

• Use only dishwasher-safe detergent and decrease the amount if the unit over-suds or clogs easily. Check the dishwasher and kitchen drains as well as the air gap and remove any debris or clogs. Pour white vinegar into the bottom of the tub and the detergent dispenser then run the hottest, longest dish washing cycle. Vinegar safely cleans, disinfects and deodorizes, preventing clogs caused by buildup.