How and Why a Dishwasher Does Not Drain
A dishwasher that doesn’t drain can be a big headache. Not only does it allow dirt water to pool in the bottom of your appliance, but failure to maintain it can result in odors, leaks (and unwanted water damage), and even mechanical problems down the line if left unattended. At Appliance Cowboys, we know that something as simple as a clog or small part failure can be the cause of the problem. Knowing the most common culprits and how to troubleshoot can save you time and money.
Why a Dishwasher Won’t Drain and What to Do About It
- Blocked Filter: The filter can be clogged with food particles and grease.
- Drain Hose Blocked: A crease or blockage in the hose prevents water from draining out.
- Garbage Disposal Connection: If a new installation, you’ll want to knock out the plug.
- Drain Pump Issues: A defective or jammed pump impeller will not be able to push out water.
- Valve Troubles: A damaged valve might be keeping water from flowing.
Step-by-Step Guide to Fixing a Non-Draining Dishwasher
1. Shut the Water and Power off
Make sure to always unplug your dishwasher from the power source or shut off the appropriate breaker before you attempt any repairs. And also turn off the water supply for safety.
2. Inspect and Clean the Filter
- Remove the bottom rack.
- Find the filter at the bottom of the dishwasher.
- Run it under hot water and scrub with a brush to remove food residue.
3. Check the Drain Hose
- Check the hose attached to the sink drain or garbage disposer for twists, kinks, or clogs.
- Remove it and run hot water through it to remove obstructions.
4. Examine the Garbage Disposal Connection
If you’ve recently installed a garbage disposal, make sure your knockout plug has been taken out; otherwise, that’s now the only way out.
5. Inspect the Drain Pump
- Open the pump below the dishwasher.
- Check the impeller for obstruction or damage.
- If the pump hums but does not circulate water, it might need to be replaced.
6. Test the Check Valve
The valve prevents water from backing up into the dishwasher. If it’s stuck or damaged, clean or replace it.
- Scrape plates before loading to reduce debris buildup.
- Run hot water in the sink before starting a cycle.
- Clean the filter weekly.
- Schedule professional maintenance annually with Appliance Cowboys dishwasher repair experts to ensure long-lasting performance.
When DIY Isn’t Enough
If you’ve followed these steps and your dishwasher is still not draining, it may be time to bring in the professionals. We work on complex drainage problems, pump failures, and circuit issues here at Appliance Cowboys.
Final Thoughts
A dishwasher that doesn’t drain is usually the result of a simple clog, but sometimes it can be a sign of more serious damage. You can usually get everything to work properly again by working through the following troubleshooting process. And not to worry, the reliable team at Appliance Cowboys is just a phone call away for all your kitchen needs.