Is your dishwasher leaving standing water at the bottom after a cycle? A dishwasher that won't drain is one of the most common appliance problems, but the good news is it's usually fixable with a simple part replacement or cleaning. This guide will help you diagnose the issue, understand what's causing it, and find the right replacement parts to get your dishwasher draining properly again.
The drain pump is responsible for pushing water out of the dishwasher. Over time, food particles, broken glass, or debris can clog the pump or damage the impeller. If you hear a humming or grinding noise but no water is draining, the pump is likely the culprit.
Solution: Inspect and clean the pump filter. If the pump motor is burned out or the impeller is damaged, you'll need to replace the drain pump assembly.
Shop Drain Pumps: WPW10348269 Whirlpool Drain Pump
The drain hose carries water from the dishwasher to your home's plumbing. Kinks, clogs, or improper installation can prevent water from flowing out.
Solution: Disconnect the drain hose and check for blockages. Straighten any kinks and ensure the hose is installed with a high loop or air gap to prevent backflow.
If your dishwasher drains through an air gap or garbage disposal, blockages in these areas can prevent proper drainage.
Solution: Clean the air gap by removing the cap and clearing any debris. If connected to a garbage disposal, run the disposal to clear any clogs and ensure the knockout plug was removed during installation.
Some dishwashers use a drain valve or check valve to control water flow. If this valve is stuck closed or damaged, water won't drain.
Solution: Inspect the valve for debris or damage. Replace if necessary.
The dishwasher filter traps food particles and debris. If it becomes clogged, water can't reach the drain pump.
Solution: Remove and clean the filter regularly (at least once a month). Check the sump area for debris.
In rare cases, a malfunctioning control board or timer may fail to signal the drain pump to operate.
Solution: Test the drain pump for continuity. If the pump is functional but not receiving power, the control board may need replacement.
Whirlpool: WPW10348269 Drain Pump
KitchenAid: Compatible with Whirlpool parts
Maytag: Compatible with Whirlpool parts
GE: Coming soon
Bosch: Coming soon
Samsung: Coming soon
LG: Coming soon
While many drainage issues can be fixed with DIY repairs, you should call a professional if:
Q: Why is there standing water in my dishwasher after the cycle?
A: Standing water is usually caused by a clogged drain pump, blocked drain hose, or dirty filter. Start by cleaning the filter and checking for visible blockages. If the problem persists, the drain pump may need replacement.
Q: How do I know if my dishwasher drain pump is bad?
A: Signs of a bad drain pump include loud grinding or humming noises, complete drainage failure, or the dishwasher stopping mid-cycle. You can test the pump with a multimeter to check for continuity.
Q: Can I use my dishwasher if it won't drain?
A: It's not recommended. Running a dishwasher that won't drain can cause water damage, mold growth, and further damage to internal components. Fix the drainage issue before using it again.
Q: How much does it cost to replace a dishwasher drain pump?
A: Drain pumps typically range from $30-$100 depending on the brand and whether you choose OEM or aftermarket. DIY installation can save you $100-$200 in labor costs.
Q: How long does a dishwasher drain pump last?
A: Most drain pumps last 5-10 years with proper maintenance. Regular filter cleaning and avoiding large food debris can extend the pump's lifespan.
Q: Will a clogged garbage disposal prevent my dishwasher from draining?
A: Yes, if your dishwasher drains through the garbage disposal, a clog can cause backflow and prevent proper drainage. Always run the disposal before starting the dishwasher.
Need help finding the right part? Contact our parts experts at XPart Supply. We'll help you identify the exact part you need based on your dishwasher's make and model.
