Dishwashers • Troubleshooting

Why Is My Dishwasher Not Draining? Common Causes

ProFix Tech TeamMcKinney, TX Appliance Repair Experts

A dishwasher that won't drain leaves standing water at the bottom of the tub after every cycle. Before calling a technician, here are the most common causes we see in McKinney kitchens.

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Common Causes

Top Reasons Your Dishwasher Won't Drain

Most drainage problems come down to one of these five causes.

Clogged Drain Hose

A kinked or blocked hose behind the unit stops water from leaving.

Blocked Filter

Food debris blocking the drain filter or basket is the most common cause.

Faulty Drain Pump

A pump that no longer spins properly can't push water out.

Air Gap Issue

An improperly installed air gap or high loop under the sink.

Quick Fix Steps

Try This Before Calling a Tech

Start by checking and cleaning the drain filter — this solves most cases.
Inspect the drain hose behind the unit for kinks or blockage.
Run the garbage disposal if connected, since it may be clogged too.
Check for a stuck check valve preventing water from leaving the tub.

If water is still standing after cleaning the filter, the pump or hose likely needs professional attention.

Modern dishwasher and kitchen appliances in a McKinney Texas home

DIY vs Professional

When to Call a Technician

Safe to Try Yourself

Cleaning the drain filter and basket
Checking for visible hose kinks
Running the disposal to clear a shared clog

Call a Professional

Replacing a drain pump or motor
Diagnosing electrical or control board issues
Fixing a faulty air gap installation under the sink

Still Not Draining After Cleaning the Filter?

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FAQs

Dishwasher Draining Questions, Answered

Why is there always water at the bottom of my dishwasher?

A small amount of standing water is normal to keep the seal moist, but more than an inch usually signals a drainage problem.

Can I use vinegar to clear a clog?

Vinegar can help clear minor buildup, but it won't fix a failed pump or blocked hose.

How much does dishwasher drain repair cost?

Cost depends on the part needed, but every ProFix Tech visit starts with an upfront quote.

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