Your Dishwasher Woes Solved: Why Your Dishwasher Won’T Drain (And How To Fix It)
What To Know
- To test the drain pump, listen for a humming sound when the dishwasher is in the drain cycle.
- An air gap is a small device installed in the sink drain to prevent water from flowing back into the dishwasher.
- A humming sound when the dishwasher is in the drain cycle is a common sign of a faulty drain pump.
A dishwasher is a modern convenience that simplifies the task of cleaning dishes. However, when it fails to drain, it can disrupt the household routine and leave a sink full of dirty dishes. Understanding the reasons behind a dishwasher not draining is crucial for troubleshooting and restoring its functionality.
Clogged Drain Hose
One of the most common causes of a dishwasher not draining is a clogged drain hose. Food particles, grease, and other debris can accumulate in the hose, blocking the flow of water. To inspect the drain hose, disconnect it from the dishwasher and check for any obstructions. If you find a clog, remove it carefully and flush the hose with hot water.
Malfunctioning Drain Pump
The drain pump is responsible for removing water from the dishwasher during the drain cycle. If the pump fails, the dishwasher will not be able to drain properly. To test the drain pump, listen for a humming sound when the dishwasher is in the drain cycle. If you don’t hear a hum, the pump may be faulty and need to be replaced.
Blocked Air Gap
An air gap is a small device installed in the sink drain to prevent water from flowing back into the dishwasher. If the air gap becomes blocked, it can create a vacuum that prevents the dishwasher from draining. To check the air gap, remove the cap and inspect it for any debris or obstructions. If the air gap is blocked, clean it thoroughly.
Faulty Door Switch
The door switch detects when the dishwasher door is closed and activates the drain cycle. If the door switch fails, the dishwasher will not start the drain cycle, even if the other components are functioning properly. To test the door switch, open and close the dishwasher door several times while listening for a click. If you don’t hear a click, the door switch may be faulty and need to be replaced.
Debris in the Dishwasher
Sometimes, large food particles or other objects can become trapped in the dishwasher, preventing it from draining properly. Inspect the dishwasher interior for any visible debris. If you find any obstructions, remove them carefully and restart the dishwasher.
Kinked or Crushed Drain Hose
A kinked or crushed drain hose can restrict the flow of water, causing the dishwasher to not drain. Check the drain hose for any kinks or crushes. If you find any, straighten or replace the hose as necessary.
Electrical Problems
In some cases, a dishwasher not draining may be caused by electrical problems. Check the power cord to ensure it is securely connected to the electrical outlet. If the power cord is damaged, replace it. You can also check the dishwasher’s circuit breaker or fuse to make sure it is not tripped or blown.
Troubleshooting Tips
- Run a drain cycle with vinegar: Vinegar can help dissolve grease and other buildup in the drain hose and pump. Add 1 cup of vinegar to the bottom of the dishwasher and run a drain cycle without any dishes.
- Clean the dishwasher filter: The dishwasher filter collects food particles and debris. Remove the filter and clean it thoroughly with hot water.
- Reset the dishwasher: Unplug the dishwasher for 30 seconds and then plug it back in. This may reset the dishwasher and resolve the drainage issue.
When to Call a Professional
If you have tried the troubleshooting tips above and the dishwasher still does not drain, it may be necessary to call a professional appliance repair technician. A trained technician can diagnose and repair the problem accurately, ensuring that your dishwasher is functioning properly again.
Questions You May Have
Q: Why does my dishwasher drain slowly?
A: A slow-draining dishwasher could be caused by a partially clogged drain hose, a malfunctioning drain pump, or an air gap blockage.
Q: What are the signs of a faulty drain pump?
A: A humming sound when the dishwasher is in the drain cycle is a common sign of a faulty drain pump.
Q: Can I clean the dishwasher filter myself?
A: Yes, the dishwasher filter can be easily removed and cleaned with hot water.
Q: What is an air gap?
A: An air gap is a small device installed in the sink drain to prevent water from flowing back into the dishwasher.
Q: How can I prevent my dishwasher from getting clogged?
A: Regularly cleaning the dishwasher filter and running a drain cycle with vinegar can help prevent clogs.