Finding a pool of water in the bottom of your dishwasher after a cycle is frustrating, but it’s also one of the most fixable appliance problems. A dishwasher that won’t drain is almost always caused by a clog or a blocked drain path. Here’s how to find the cause and fix it, and when it’s time to call a professional.
Serving Grand Rapids & all of West Michigan
Why Your Dishwasher Won’t Drain: Top Causes
1. Clogged Filter
The most common culprit. Food debris collects in the filter at the bottom of the tub. Remove the bottom rack, twist out the filter, and rinse it under warm water. Do this monthly to prevent drainage problems.
2. Blocked or Kinked Drain Hose
The drain hose runs from the dishwasher to your sink drain or garbage disposal. Check it for kinks and clogs, a common trap point is where it connects to the disposal.
3. Clogged Garbage Disposal or Air Gap
If your dishwasher drains into a garbage disposal, a clog there (or a disposal plug that was never removed after installation) will back water up. If you have an air gap on the counter, clean it out, it can clog with debris.
4. Failed Drain Pump
If the filter, hose, and disposal are all clear but water still sits, the drain pump may have failed or be jammed by glass or debris. This typically calls for a professional repair.
5. Garbage Disposal Plug Still In Place
On a newly installed disposal, the knockout plug must be removed for the dishwasher to drain. If your dishwasher never drained after a new disposal was installed, this is often why.
Quick DIY Fix Checklist
- Run the disposal (if connected) to clear its side of the drain.
- Clean the dishwasher filter at the bottom of the tub.
- Check the drain hose for kinks and clogs.
- Clean the air gap on the counter, if present.
- Run a rinse cycle to test.
If water still won’t drain after these steps, the drain pump or control likely needs professional attention.
How Much Does Dishwasher Repair Cost?
A drain-related dishwasher repair usually runs $120 to $300 depending on the cause. A simple hose or clog fix is on the low end; a drain pump replacement is higher. A technician can confirm the cause quickly and get it draining again.
Dishwasher Repair in Grand Rapids & West Michigan
If your dishwasher still won’t drain, our experienced local technicians can help. We repair all major brands, Bosch, Whirlpool, KitchenAid, Samsung, LG, GE, and more, with same-day and next-day appointments. Book our dishwasher repair in Grand Rapids, or see our garbage disposal repair guide (a common cause of drainage issues). We also serve Kentwood and Wyoming.
Frequently Asked Questions
Why is there standing water in my dishwasher?
Almost always a clog, in the filter, drain hose, or connected garbage disposal. Clean the filter and clear the disposal first.
Can I run my dishwasher if it won’t drain?
It’s best not to, running it can overflow and may strain the pump. Clear the drain path first, or book a repair.
How do I clean my dishwasher filter?
Remove the bottom rack, twist out the cylindrical filter at the base of the tub, rinse under warm water, and reinstall. Do this monthly.