Why Is My Dishwasher Leaking and How Do I Fix It?

Root cause

If the unit isn't sitting level, water inside the tub can shift to one side during the wash cycle and overflow the lip at the bottom of the door, even with a perfectly healthy door gasket.

30-second check

Place a small level on the top front edge of the unit, both front-to-back and side-to-side.

Tools & materials

A level, an adjustable wrench or hex socket for the leveling legs.

Step-by-step

1. 1 Remove the lower kick panel to access the front leveling legs.
2. 2 Place the level on top of the unit and check both directions.
3. 3 Adjust the front leveling legs with a wrench — clockwise to raise, counterclockwise to lower — until level.
4. 4 Replace the kick panel.
5. 5 Run a test cycle and check for leaking at the front of the door.

Root cause

The rubber seal around the door frame dries out, cracks, or gets coated in grease over years of use, breaking the watertight seal and letting water seep out along the bottom or sides of the door during a cycle.

30-second check

Run your hand along the rubber seal, feeling for cracks, hardened spots, or missing pieces, and check for a film of grease buildup.

Tools & materials

A replacement gasket matching your model, a hairdryer, a damp cloth.

Step-by-step

1. 1 Turn off power to the unit.
2. 2 Wipe down the existing gasket with warm soapy water to rule out simple grease buildup as the cause.
3. 3 If cracked or damaged, remove the old gasket and clean the channel it sits in.
4. 4 Warm the new gasket with a hairdryer on low to make it pliable.
5. 5 Press the new gasket into place starting at the top center and working down both sides evenly.
6. 6 Run a test cycle and check the door area for leaks.

Root cause

Regular dish soap creates far more suds than dishwasher-specific detergent, and the excess foam pushes out around the door seal during a cycle. Separately, a clogged bottom filter can cause water to pool and eventually overflow even with a good gasket.

30-second check

Suds or foam visibly leaking from the door points to detergent. Standing water in the tub after a completed cycle points to the filter.

Tools & materials

Dishwasher-safe detergent; no tools needed for the filter check.

Step-by-step

1. 1 Confirm you're using dishwasher-specific detergent, not regular dish soap — switch if needed.
2. 2 Remove the bottom rack and locate the filter near the spray arm.
3. 3 Twist and lift the filter out per your model's release mechanism.
4. 4 Rinse thoroughly under running water, removing trapped food and debris.
5. 5 Reinstall the filter and run a test cycle.

Root cause

If the unit is level, the gasket is intact, detergent and filter are fine, and it's still leaking, the source is likely inside the machine — a cracked circulation pump housing, a loose or split hose connection, or a failed water inlet valve.

30-second check

Line the front, sides, and area underneath with dry paper towels and run a cycle. Water appearing underneath the unit first points to an internal issue.

What a professional actually does

Runs a diagnostic cycle while observing the pump, hoses, and valve directly; pressure-tests connections; replaces the specific failed component; and confirms no leak remains across a full cycle before finishing the job.