Replace a Leaking Dishwasher Door Gasket

Water pooling under your dishwasher is the dishwasher's way of telling you the door seal has given up. That rubber gasket around the inside perimeter of the door compresses when you close it, creating a watertight seal during the wash. After a few years of heat cycles and detergent exposure, it hardens, cracks, or shrinks—and water finds its way out onto your kitchen floor. The good news is this is one of the easiest appliance repairs you can do yourself. No special tools. No electrical work. Just remove the old gasket, identify the part number, buy a replacement, and press the new one home. It's the kind of repair that pays for itself the first time you avoid calling a service tech.

1. Kill Power First. Before you touch anything, turn off the circuit breaker for the dishwasher or unplug it from the outlet if it's portable. You're not working with live electricity here, but this is standard practice so you don't accidentally activate the pump or heating element while you're working.
2. Assess the Damage. Open the dishwasher door fully. Look at the rubber seal running around the inner perimeter where the door meets the tub. Feel it with your fingers—is it cracked, dried out, hardened, or visibly torn? You're looking for the obvious signs of wear. Also check if there's standing water in the bottom of the tub; that confirms the seal has failed.
3. Extract the Old Seal. Most gaskets simply press into a groove that runs the perimeter of the door frame. Using your fingers or a plastic scraper, gently pry up one corner of the gasket and start pulling it out of the channel, working your way around the door. It should come free without much resistance. Some models have a clip or two holding it—look for small plastic or metal fasteners and pop them off. Don't force it if it seems stuck; apply some warm soapy water to soften it first.
4. Scour the Channel Clean. Once the old gasket is out, inspect the groove it was sitting in. You'll likely find years of detergent residue, mineral deposits, and mold. Wipe it all out with a damp cloth and an old toothbrush. Pay special attention to the corners. A clean channel ensures the new gasket sits evenly and seals properly. Dry it completely with a clean cloth.
5. Match Your Model Exactly. Look inside the dishwasher door edge or on the side wall of the tub for a model number sticker. It usually starts with the manufacturer name (Bosch, LG, Whirlpool, etc.) and contains letters and numbers. Write it down. Call the manufacturer's parts line or visit their website, or go to an online appliance parts retailer with this number. Search for 'door gasket' and your model number. Buy the exact match. Gaskets are inexpensive and ship quickly.
6. Ready the Replacement. When your replacement arrives, unpack it and lay it flat on the counter for a few minutes so it relaxes into its natural shape. Check the length against the perimeter of your door. It should be a continuous loop with no gaps or seams; if there are seams, they're factory-made and normal. If the gasket has clips or fastening hardware, make sure everything is included.
7. Snap It Home. Begin at one of the top corners of the door frame. Press the gasket into the groove, starting with a 6-inch section. Push it firmly but smoothly into the channel. You should hear or feel a subtle snap as it seats. Work your way around the perimeter, pushing as you go. Take your time—there's no rush. The gasket should sit evenly in the groove all the way around.
8. Check All Four Corners. Once you've gone all the way around, stop and visually inspect the entire gasket. It should sit flush and even in the groove on all sides. Pay special attention to the four corners—they're the hardest to seat properly and the most common place for gaps. If you see any raised edges or gaps, gently pry that section out and re-seat it. The gasket should lie flat, not twisted or bunched anywhere.
9. Test the Door Feel. Close the dishwasher door normally. It should feel like it's seating firmly against the gasket—you might notice a bit more resistance than before, which is a good sign. The door should not close with excessive force, but it should feel secure. If it closes too hard, the gasket might be sitting too high; open it and gently reposition that section.
10. Run a Dry Test. Plug the dishwasher back in or flip the circuit breaker. Don't load it yet. Run it on a short wash cycle (rinse or quick wash if available) without any dishes inside. Watch carefully for any water leaking from the door seals, the bottom edges, or anywhere else. If it's bone dry after a full cycle, you're done.
11. Monitor a Full Week. After the test cycle passes, load your dishes normally and use the dishwasher as usual. Check underneath the appliance once a day for the next week for any pooling water. Sometimes a gasket takes a few cycles to fully seat and compress. If there's still a leak after three full cycles, the gasket might be installed incorrectly or the model might be wrong—go back and check your work or contact the parts supplier.