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How to Fix Common Issues with a Dishwasher Drain Hose

If your dishwasher isn’t draining after you run a cycle, cleaning out clogged food debris in the drain basket, the air gap, or the garbage disposal typically solves the problem. However, when these solutions don’t work, an issue with the drain hose may be responsible. The drain hose is a ribbed plastic hose that connects the dishwasher drain pump to the air gap or the garbage disposal. Over time, it can easily become kinked or clogged, preventing your dishwasher from draining. Here’s how to address the issue.

Check for Kinks 

Large or heavy objects stored beneath your sink can push on the drain hose, causing kinks in the lightweight plastic. Locate the house and check for kinks. You can straighten it out manually to solve the issue for the time being. Often, however, after developing a kink, the hose becomes vulnerable at that spot and will kink in the future. A drain hose that continues kinking should be replaced to prevent this problem from recurring.

Check for Clogs 

Clogs from built-up food debris can also affect the performance of your dishwasher. Unplug the unit, place towels around the bottom to absorb any excess water, then remove the lower front panel of the unit to find the area where the drain hose connects to the drain pump. Disconnect the hose and blow air into it – if the air does not pass through the hose, it is clogged.

Clogs located close to either end of the hose can be removed with a screwdriver, straightened out wire hanger, or any other long, thin tool. A clog that’s lodged deeper into the hose will likely require a hose replacement. Do not attempt to use a plumber’s snake to extract the clog, as the hose is not designed to accommodate this tool and can become punctured.

Call Columbia Drain 

If you removed the kinks or clogs in your drain hose and the dishwasher is not still not draining properly, contact Columbia Drain. Our experienced, fully licensed plumbers can replace the hose for you or take care of any other problems that may be affecting your dishwasher, such as a faulty pump, timer, or motherboard. 


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