Dishwasher Leaking? Here's Why and How to Fix It

A leaking dishwasher can leave a mess in your kitchen and even cause water damage if it’s not fixed quickly. When you see water pooling around your dishwasher, don’t worry — most leaks are caused by issues that you can fix yourself.

In this guide, we’ll go over common reasons why your dishwasher might be leaking and how to get it working correctly again.

Why Is My Dishwasher Leaking?

A leaking dishwasher usually happens because of one of these problems:

• Worn out or dirty door seal: The rubber gasket around the door helps keep water inside. If it’s cracked, loose, or covered in grime, water can seep out.
• Loose or damaged hoses: The water supply and drain hoses can loosen over time or develop cracks, leading to leaks.
• Faulty water inlet valve: This valve controls how much water enters the dishwasher. If it’s broken, water can overflow.
• Too many dishes or too much detergent: Overloading your dishwasher or using too much soap can cause excessive water movement or too many suds, leading to water overspill.
• Clogged dishwasher filter: If the filter is full of food particles and debris, it can block the drain and cause leaks.
• Clogged drain: If the drain is clogged, water won’t exit the dishwasher properly and may spill out instead.
• Unleveled dishwasher: If your dishwasher isn’t sitting evenly on the floor, water can leak out during a wash cycle.

Why Is My Dishwasher Leaking from the Bottom?

If water is pooling underneath your dishwasher, one of these issues is likely the cause:

• Leaky pump seal: The circulation pump moves water through the dishwasher, and if the seal is worn out, water can escape.
• Cracked or broken spray arm: If the spray arm is damaged, it might be spraying water in the wrong direction, leading to leaks.
• Worn-out dishwasher tub: Over time, the inside of your dishwasher can develop cracks that let water leak through.
• Drain hose problems: A loose, clogged, or cracked drain hose can cause water to leak underneath the unit.

How to Fix a Leaking Dishwasher

Before calling in a professional, try these DIY tips to help you identify what’s causing your leaking dishwasher — and follow the steps to fix it.

1. Check and Clean the Door Seal

The door seal plays a key role in keeping water inside the dishwasher. If it’s dirty or damaged, water can seep out. Here’s how to check and clean it:

• Open the dishwasher and inspect the rubber gasket around the door.
• Wipe away any dirt or food particles with a damp cloth.
• Run your fingers along the seal to check for cracks or any loose parts.
• If the seal is damaged, remove it and install a new one following the manufacturer’s instructions.

After replacing or cleaning the seal, run a cycle and check for leaks. If the problem continues, move on to other potential causes.

2. Inspect and Tighten Hoses

Dishwasher hoses connect to both the water supply and the drain system. If they are loose or damaged, they can cause leaks. Follow these steps to check them:

• Turn off the water supply to the dishwasher.
• Remove the kick plate (the bottom front panel) and check for loose or damaged hoses.
• Tighten loose connections with a wrench.
• If a hose is cracked or leaking, replace it with a new one that matches your dishwasher’s specifications.

Once you’ve secured the hoses, turn the water back on and run a test cycle to see if the leak stops.

3. Replace a Faulty Water Inlet Valve

The water inlet valve controls how much water enters your dishwasher. If it’s malfunctioning, it can cause water to overflow and leak. Here’s how to replace it:

• Unplug the dishwasher and turn off the water supply.
• Locate the water inlet valve and check for leaks. It’s usually found behind the bottom panel, on the left or right side near the front of the dishwasher. It looks like a small metal or plastic piece with a water line and an electrical connector attached.
• If it’s faulty, disconnect it and install a new one.
• Make sure all connections are tight before turning the water back on.

After replacing the valve, test the dishwasher to ensure water is flowing correctly without leaks.

4. Avoid Overloading and Using Too Much Detergent

Overloading your dishwasher or using too much soap can cause leaks by creating too many suds or water movement. Here’s what to do:

• Make sure your dishes are loaded properly so they don’t block the spray arms.
• Use the correct amount of detergent. Check the manufacturer’s recommendations.
• If you see a lot of suds inside, run an extra rinse cycle using only water to clear out the excess soap.

5. Clean Your Dishwasher Filter

A clogged filter can stop water from draining properly and cause water to pool inside your dishwasher, which can cause leaks. To clean your dishwasher filter, follow these steps:

• Locate the filter at the bottom of your dishwasher.
• Remove it by twisting or unlocking it, depending on your model.
• Rinse it under warm water and scrub away food particles with a soft brush.
• Check the filter housing for debris and clean it out.
• Reinstall the filter and ensure it’s securely in place before running a test cycle.

6. Clear a Blocked Drain

A clogged drain can cause water to back up and leak out of your dishwasher. Clearing the blockage can help prevent future leaks. Here’s how:

• Remove the bottom rack and pull out the dishwasher filter.
• Check the filter for food debris or grease buildup and clean it out.
• Use a small brush or toothpick to clear out the drain opening.
• Pour a mixture of vinegar and baking soda into the drain, then flush with hot water to break up any buildup.

Once the drain is clear, run a cycle and monitor for leaks to see if the problem is resolved.

7. Level Your Dishwasher

If your dishwasher isn’t level, water can pool in the wrong areas and leak out. Checking and adjusting its position is a simple fix:

• Use a level tool to check if your dishwasher is sitting evenly.
• If tilted, adjust the leveling legs by turning them clockwise or counterclockwise until the appliance sits properly.

Once your dishwasher is correctly positioned, run a short cycle to see if the leak stops. Periodically checking that your dishwasher is level can prevent future leaks and improve its overall performance.

Protect Your Dishwasher With a Home Warranty

A leaking dishwasher can be frustrating, but in many cases, you can fix it yourself by checking for common problems and following the repair steps mentioned above. But if you have a home warranty plan, it can help safeguard your budget from a costly repair or replacement. A First American home warranty covers the major home appliances and systems you use daily.

Learn more about our comprehensive home warranty coverage and the budget protection and peace of mind it provides, and get a free quote today.

Leaking Dishwasher FAQs

How do I know if my dishwasher leak is serious?

If you’re seeing large puddles, ongoing leaks, or signs of water damage around your cabinets or floors, you may need a professional repair or even a replacement.

Can I use my dishwasher if it's leaking?

It’s best to stop using it until the issue is fixed. Running a leaking dishwasher can cause more water damage or even lead to electrical hazards.

Does a home warranty cover dishwasher leaks?

Yes, a home warranty can help with unexpected dishwasher repairs or replacements. With dishwasher coverage, you can request service from a prescreened professional for a covered breakdown.

The contents of this article are provided for general guidance only. First American Home Warranty does not assume any responsibility for losses or damages as a result of using this information.

Please be aware that if you disassemble a covered system or appliance, it can invalidate your home warranty or manufacturer's warranty.