What you need to know before you start
A dishwasher door seal (also called a gasket) is a rubber or silicone strip that runs around the inside edge of the door and creates a watertight seal when the door closes. When it cracks, hardens, or stops sealing properly, water leaks onto your kitchen floor during the wash cycle. Replacing it is a straightforward job that takes about 30 minutes and costs $30 to $150 for the part, depending on your dishwasher model.
The seal sits in a groove or channel around the door's inner perimeter. You remove the old one by hand, clean the channel, and press the new one into place. No tools are required beyond what you already have in your kitchen. The hardest part is finding the correct replacement seal for your specific dishwasher model—not the installation itself.
Key Takeaways
- Order the correct replacement seal by looking up your dishwasher's model number on the manufacturer's website or a parts retailer like Appliances Connection or Repair Clinic.
- Turn off the dishwasher's water supply at the shutoff valve under the sink before you begin, even though you are not opening any water lines.
- Pull the old seal straight out of its channel by hand—it should come free without tools, though it may require steady pressure if it has hardened.
- Clean the channel with a damp cloth and let it dry completely before inserting the new seal, because soap residue or moisture prevents a tight fit.
- Press the new seal into the channel all the way around the door, starting at one corner and working your way around, making sure it sits evenly in the groove.
Finding your dishwasher model number and ordering the right seal
The model number is printed on a sticker inside your dishwasher, usually on the top edge of the tub or on the side wall. Open the door fully and look along the upper left or right edge—you will see a white or silver label with the manufacturer name, model number, and serial number. Write down the model number or take a photo.
Go to the manufacturer's website (Bosch, LG, Whirlpool, GE, Maytag, Frigidaire, or whoever made your machine) and search for your model number in their parts section. The door seal will be listed as "door gasket" or "door seal." Order it directly from the manufacturer, or use a third-party parts retailer like Repair Clinic, Appliances Connection, or PartSelect. Prices vary, but expect to pay between $30 and $150. The part usually arrives in three to seven business days.
Turning off the water supply and preparing the dishwasher
Locate the water shutoff valve under your sink—it is a small knob on the hot water line that feeds the dishwasher. Turn it clockwise until it stops. You do not need to turn off the main water supply to your house. This step protects you in case you accidentally bump the door latch or trigger the fill valve while working.
Open the dishwasher door fully and prop it open with a towel or wedge so it stays in place while you work. You will be reaching into the door channel, and a door that swings shut can pinch your fingers. Leave the door open for the entire job.
Removing the old door seal
Look at the inside edge of the door where it meets the tub. You will see a rubber or silicone strip running all the way around—that is the seal. It sits in a shallow channel or groove. Starting at one corner (usually the top left), grip the seal firmly and pull it straight out toward you. Use steady, even pressure rather than jerking. The seal should slide out of the channel without resistance, though if it has hardened from age it may require more force.
Work your way around the door, pulling the seal out in sections. Once the entire seal is out, inspect the channel for debris, dried soap, or mold. Wipe it clean with a damp cloth, then dry it thoroughly with a paper towel or clean rag. Any moisture or residue left in the channel will prevent the new seal from seating properly and may cause leaks.
Installing the new door seal
Remove the new seal from its packaging and let it sit at room temperature for a few minutes if it has been stored in a cold place. A cold seal is stiffer and harder to work with. Warm seals are more flexible and easier to press into the channel.
Start at the top left corner of the door. Press the seal into the channel, using your thumb or the heel of your hand to push it down firmly. Work your way around the door clockwise, pressing as you go. The seal should slide into the groove smoothly. If you feel resistance, stop and check that the seal is aligned straight—a twisted seal will not fit. Once you have gone all the way around, go back and press along the entire seal one more time to make sure it is seated evenly in the channel.
Pay special attention to the corners, where the seal changes direction. Press firmly here to may support a tight fit. The seal should sit flush in the channel with no gaps or bulges.
Testing the seal and turning the water back on
Close the dishwasher door gently and listen for a solid click as the latch engages. Open it again and inspect the seal visually—it should be sitting evenly in the channel all the way around with no twists or gaps. If you see a gap or the seal looks uneven, open the door and reseat that section by pressing it back into the channel.
Turn the water shutoff valve back on by turning it counterclockwise. Run a short wash cycle (such as the rinse-only cycle) and watch for leaks around the door. If water drips onto the floor, turn off the water when ready, open the door, and check the seal. The most common cause of leaks is a twisted seal or one that is not fully seated in the channel. Remove it, clean the channel again, and reinstall it, paying close attention to alignment.
Common mistakes to avoid
The most frequent error is ordering the wrong seal. Always look up your exact model number before ordering—a seal for a similar model will not fit. The second mistake is leaving soap residue or moisture in the channel. This prevents the new seal from seating properly and causes leaks within the first few wash cycles. Take time to clean and dry the channel thoroughly.
A third mistake is twisting the seal as you install it. The seal should go straight into the channel without any spiral or rotation. If you feel resistance, stop and check alignment. Finally, do not force the seal into a corner or tight spot. If it does not slide in smoothly, remove it and try again. Forcing it can tear the rubber or silicone.
Frequently Asked Questions
How do I know if my door seal is actually broken?
Water pooling on your kitchen floor during or right after a wash cycle is the clearest sign. You may also notice water inside the tub that should have drained, or a musty smell from mold growing in the seal. Open the door and look at the seal—if it is cracked, hardened, or visibly torn, it needs replacement.
Can I use silicone caulk to patch a cracked seal instead of replacing it?
No. Caulk is not flexible enough to handle the repeated opening and closing of the door, and it will crack or peel away within a few wash cycles. The seal must be replaced as a complete unit to work properly.
What if the new seal does not fit into the channel?
Check that you ordered the correct model number for your dishwasher. If you did, the seal may be too cold or stiff. Let it warm to room temperature and try again. If it still does not fit, contact the parts retailer—you may have received the wrong item.
Do I need to call a repair person, or is this really a job I can do myself?
This is genuinely a job you can do yourself. No special tools, plumbing knowledge, or electrical work is involved. If you can follow the steps above, you can replace a door seal. The only reason to call a repair person is if the seal is stuck so firmly that you cannot remove it by hand, or if you discover a different problem while the door is open.
How long does a dishwasher door seal usually last?
Most seals last five to seven years with normal use. They wear out faster if your dishwasher runs frequently, if you live in a hard-water area, or if the seal is exposed to extreme heat. Once you replace it, the new seal should last just as long.