Naperville 
Why Won't My Whirlpool Dishwasher Drain?
Standing water at the bottom of the tub after a cycle almost always means something is physically blocking the water's path out, not a control board or timer problem. On most Whirlpool models, that path runs from the tub through a removable filter, past a small chopper blade that grinds food waste, and out through a drain hose that loops up near the countertop before connecting to your sink drain or garbage disposal. A blockage at any one of those points stops the whole cycle from draining.
Things to Check Before Calling for Repair
- Clean the filter, and don't assume it cleans itself. Most Whirlpool dishwashers use a manual-clean filter system rather than a self-cleaning grinder, which means food debris builds up in it faster than owners expect. Twist and lift the cylindrical filter out from the bottom of the tub, rinse it thoroughly under the tap, and reseat it. This alone resolves the majority of drainage complaints.
- Check the chopper blade for a jammed object. Below the filter, a small chopper blade grinds soft food waste before it drains out. A piece of glass, a bone fragment, a twist tie, or a produce sticker can jam it and stop the pump from pushing water anywhere. With the power disconnected, look and feel carefully around the sump area for anything caught in it.
- Check the drain hose's "high loop" under the sink. Whirlpool's install instructions call for the drain hose to loop up as high as possible under the counter before running down to the disposal or drain line. If that loop was skipped during installation, or has sagged or kinked over time, dirty water can siphon back into the tub instead of draining away.
- Remove the garbage disposal knockout plug, on a new installation. If the dishwasher drains into a garbage disposal, there's a knockout plug inside the disposal's inlet that has to be knocked out before first use. If it's still in place, the dishwasher has nowhere to drain to, a common oversight after installing a new disposal or dishwasher.
- Run the disposal before starting the dishwasher if they share a drain line. This clears the disposal's own chamber first so it isn't already partly blocked when the dishwasher tries to drain through it.
When It's the Drain Pump, Not a Clog
If everything above checks out and water is still sitting in the tub, the drain pump motor or its check valve has likely failed. The check valve is a small one-way flap that stops drained water from siphoning back into the tub, if it's stuck or broken, water can come right back in even when the pump itself is working fine. On some Whirlpool models, the control panel's Clean light blinks a set number of times to flag a drain-related fault, check your owner's manual to see if your model uses this pattern. Either way, a failed pump or valve needs a technician to properly diagnose and replace.
Frequently Asked Questions
Why is there standing water in my Whirlpool dishwasher after a cycle?
Almost always a blockage somewhere in the drain path, most often the filter, the chopper blade, or the drain hose's high loop. Clean the filter first, since that resolves most cases on its own.
Does my Whirlpool dishwasher's filter clean itself?
Most Whirlpool models don't. Unlike some brands' self-cleaning grinder systems, Whirlpool typically uses a manual-clean filter, so it needs to be pulled out and rinsed by hand every few weeks to prevent buildup.
What is the "high loop" in a dishwasher drain hose?
It's a point where the drain hose is routed up near the countertop before running back down to the disposal or drain, required so dirty sink water can't siphon back into the dishwasher. If it's missing, sagged, or kinked, drainage problems follow.
How much does it cost to fix a dishwasher that won't drain?
A filter clean or a cleared chopper blade costs nothing. A drain pump or check valve replacement costs more in parts and labor. See our full appliance repair cost guide for typical dishwasher repair ranges.