What the dishwasher seal does and when to replace it
The door seal (also called a gasket) is the rubber strip that runs around the inside edge of your dishwasher door. It creates a watertight barrier so water stays inside the tub during the wash cycle. When the seal wears out, water leaks onto your kitchen floor, or your dishes don't get as clean because water escapes instead of circulating.
You'll know the seal needs replacing if you see water pooling under the dishwasher, notice a musty smell inside the door frame, or find the door won't close all the way. Most seals last 5 to 10 years depending on how often you run the machine. The good news: replacing one takes about 30 minutes and costs $35 to $150 for the part, depending on your model.
Key Takeaways
- Turn off power at the breaker or unplug the dishwasher before you start, and let it sit for 10 minutes to cool.
- The seal sits in a groove or channel around the inside of the door frame—you can usually pry it out by hand or with a plastic tool, then slide the new one in.
- Find your exact model number (usually on a sticker inside the door edge) and order the matching seal from the manufacturer or a parts retailer.
- Test the new seal by running a short cycle and checking for leaks before you load dishes normally.
Find your dishwasher model number and order the correct seal
The seal must match your exact model, because different dishwashers have different door shapes and groove sizes. Open your dishwasher door and look for a sticker on the top or side of the door frame—it will show the brand (Whirlpool, LG, Bosch, etc.) and a model number starting with letters and numbers. Write down the full model number.
Search that model number on the manufacturer's website or on parts retailers like Appliances Connection, PartSelect, or Amazon. The seal is usually listed as "door gasket" or "door seal." Order it now so you have it on hand. Shipping typically takes 3 to 7 days. While you wait, you can still use the dishwasher, but wipe up any water that leaks underneath.
Turn off power and remove the old seal
Unplug the dishwasher or switch off the breaker that controls it. If you're not sure which breaker, unplug it from the outlet. Wait 10 minutes so any residual power drains and the door latch releases fully. Open the door all the way.
Look at the inside edge of the door frame where the rubber seal sits. Most seals sit in a groove or channel that runs all the way around. Starting at a corner, use your fingers or a plastic spoon to gently pry the seal out of the groove. Work your way around the door, pulling steadily. The seal should come free without much resistance—if it's stuck, spray a little warm water along the groove to loosen it. Once it's out, set it aside (you don't need to keep it).
Clean the groove before installing the new seal
While the groove is empty, wipe it clean with a damp cloth. Food particles, mineral deposits, and old rubber bits can prevent the new seal from sitting flush, which causes leaks. Use your finger or a soft brush to get into the corners. Dry the groove completely with a clean cloth.
Inspect the groove itself for cracks or damage. If the plastic channel is cracked or the metal underneath is rusted, the new seal won't hold water properly, and you may need to call a repair technician. In most cases, though, the groove is fine and just needs cleaning.
Install the new seal and test it
Remove the new seal from its packaging. If it's been stored in a cold place, let it sit at room temperature for 5 minutes so it's more flexible. Starting at the top center of the door, press the seal into the groove, working your way down one side. The seal should slide in smoothly—don't force it. Once one side is seated, do the other side, then the bottom. The seal should form a continuous loop with no gaps or twists.
Close the door gently and check that it closes smoothly without binding. The seal should compress slightly but not bulge out. If the door is hard to close, the seal may be twisted—open it and adjust. Once it closes easily, plug the dishwasher back in or switch the breaker back on.
Run a test cycle and check for leaks
Run a short wash cycle (like a rinse-only or quick wash) with no dishes inside. This lets you see if the new seal holds water without wasting a full load. Watch the floor underneath and around the door for any water. If you see a small drip at the very bottom, the seal may not be fully seated—stop the cycle, open the door, and press the bottom of the seal deeper into the groove.
If water leaks from the sides or top, the seal may be twisted or the groove may have debris. Stop the cycle, remove the seal, clean the groove again, and reinstall it. Once the test cycle completes with no leaks, you're done. Load your dishes normally and run a full cycle to confirm everything works.
Common mistakes that cause leaks after replacement
The most common error is not cleaning the groove thoroughly before installing the new seal. Even a small piece of dried food or mineral buildup can create a gap where water escapes. Take your time with this step—it takes only 2 minutes and prevents leaks.
Another mistake is twisting the seal as you install it. The seal should lie flat in the groove with no spirals or kinks. If you notice a twist, remove the seal, straighten it, and reinstall it. Finally, don't overtighten the door latch. The door should close firmly but not require force—if it's hard to close, the seal is probably compressed too much, which can damage it over time.
Frequently Asked Questions
Can I use any generic dishwasher seal, or does it have to match my model?
It must match your model. The groove size, door shape, and latch mechanism vary between brands and even between models from the same brand. A seal that's too small will fall out; one that's too large won't fit in the groove. Always order the seal for your exact model number.
What if the groove is cracked or damaged?
A cracked groove usually means the door frame itself is damaged and needs replacement. This is a larger repair that typically requires a technician. If the crack is very small and only in the plastic, you can try installing the seal and testing it, but it may not hold water long-term.
How long does a new seal last?
Most seals last 5 to 10 years, depending on how often you run the dishwasher and how hard the water is in your area. Hard water deposits can degrade rubber faster. If you notice leaks again within a few years, the seal may have failed prematurely—contact the manufacturer about a warranty claim.
Do I need to call a repair person, or can I really do this myself?
You can do this yourself if you're comfortable following steps and don't mind spending 30 minutes. No special tools are needed beyond a plastic spoon or butter knife. If you're unsure at any point, a repair technician can do it in under an hour, though the service call will cost $100 to $300 depending on your area.
What if water still leaks after I install the new seal?
First, run another test cycle and watch where the water comes from. If it's from the door, remove the seal, clean the groove again, and reinstall it, making sure there are no twists. If water leaks from the bottom or sides of the tub itself (not the door), the problem is inside the dishwasher, not the door seal, and you'll need a technician to diagnose it.