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Dishwasher Leaking: Causes & Fixes

Water on the floor, from the door, or underneath.

A worn, cracked, flattened, or misaligned door gasket (seal) is a documented cause of dishwasher leaks, typically seen as water along the front edge or corners of the door; both Whirlpool and Samsung list it as a first check.

Before you work on your dishwasher

  • Power: Unplug the dishwasher or switch off its circuit breaker before removing panels or touching wiring.
  • Water: Turn off the water supply valve before disconnecting hoses or the inlet valve.
  • Heat: Water and the heating element can be hot right after a cycle; let the dishwasher cool first.
  • Sharp debris: Wear gloves when reaching into the filter or sump; broken glass often collects there.
  • Stop: If you smell burning, see smoke or sparks, or find water near wiring, switch off the breaker and call a technician.
  • Disconnect power before accessing internal dishwasher parts: Unplug the dishwasher or switch off the circuit breaker that powers it before removing panels, the filter, or the drain pump cover, or before reaching into the sump.
  • Heavy appliance: two-person lift: A dishwasher is heavy and can tip. Do not pull it out of the cabinet, tilt it, or lift it by yourself; get a second person to help.
  • Shut off the water supply before disconnecting hoses: Turn off the water supply before disconnecting the drain hose, siphon connection, or water inlet, or before pulling the dishwasher out for service.

Why your dishwasher is leaking

  1. Door gasket worn, damaged, or misaligned: A worn, cracked, flattened, or misaligned door gasket (seal) is a documented cause of dishwasher leaks, typically seen as water along the front edge or corners of the door; both Whirlpool and Samsung list it as a first check. Difficulty 1/5.
  2. Wrong or excess detergent/rinse aid causing oversudsing: Using regular dish soap or too much/the wrong type of detergent (or spilled liquid rinse aid) causes oversudsing; the excess suds push water out past the door seal, causing a leak or flooding condition. Difficulty 1/5.
  3. Dishwasher not level or not square in the cabinet: An unlevel dishwasher, especially one sitting lower in front than in back, lets water pool against the door and leak out at the bottom. Difficulty 1/5.
  4. Loose, cracked, or worn water supply or drain hose connections: A worn, cracked, or loose water supply line, drain tube, or hose connection can leak; Samsung recommends checking the full length of the hose and both ends where it connects. Difficulty 2/5.
  5. Worn pump/motor shaft or diverter seal: Water pooling under the center or rear of the dishwasher can indicate a worn pump/motor shaft seal or diverter seal, letting water escape from the circulation or drain pump assembly. Difficulty 1/5.
  6. Door vent cap loose (GE): GE documents a loose vent cap on the inside of the door's top corner as a specific cause of a door leak, separate from the main door gasket. Difficulty 1/5.
  7. Cracked tub or pump housing: Whirlpool identifies a cracked tub as a possible, less common cause of persistent leaking that is not resolved by gasket replacement or leveling. Difficulty 1/5.

Find the cause for your dishwasher

Before anything else: is water near the power cord, outlet, or wiring, or do you smell burning or see smoke?

Step-by-step checks for a dishwasher leaking

Check detergent type, amount, and rinse-aid spills

About 5 minutes

  1. Confirm only automatic dishwasher detergent is used, not dish soap.
  2. Check the amount used against the manufacturer's recommendation.
  3. Look for spilled liquid rinse aid or excess suds in the tub.

Check the door vent cap

About 5 minutes

  1. Open the door.
  2. Locate the vent cap at the top interior corner of the door.
  3. Check whether it is loose.

Check that the dishwasher is level

About 15 minutes

  1. Place a level on the tub opening or door, side-to-side and front-to-back, and note whether it is level.

Check overfill float movement

About 10 minutes

  1. Remove the lower rack.
  2. Locate the overfill float in the tub.
  3. Lift the float by hand and let it drop; it should move freely without sticking.

Inspect the door gasket

About 10 minutes

  1. Open the door and run a finger along the full perimeter of the gasket.
  2. Look for cracks, tears, flattened sections, or food residue.
  3. Check whether the seal has popped out of its channel.

Inspect water supply and drain hose connections

About 15 minutes

  1. Open the base panel or access hoses under the cabinet.
  2. Do not open the junction-box cover.
  3. Check hose clamps and connection points for tightness, cracks, or looseness.

How to fix a dishwasher leaking

Clean and free the overfill float

About 15 minutes · Difficulty 1/5

  1. Remove the lower rack.
  2. Lift out and clean the overfill float and its well of debris or detergent buildup.
  3. Reinstall and confirm the float moves freely.

Hand tighten the door vent cap

About 5 minutes · Difficulty 1/5

  1. Open the door.
  2. Locate the vent cap at the top interior corner.
  3. Hand tighten the vent cap.

Level the dishwasher

About 20 minutes · Difficulty 1/5

  1. Place a level on the tub opening or door.
  2. Adjust the leveling feet, front and rear, until level side-to-side and front-to-back.

Push a misaligned door seal back into its channel

About 10 minutes · Difficulty 1/5

  1. Open the door and locate the section of seal that has popped out.
  2. Press the rubber seal back into the channel along its full length.

Stop oversudsing and switch to proper detergent

About 5 minutes · Difficulty 1/5

  1. Stop running the dishwasher and let suds dissipate for several hours.
  2. Use only detergent made for automatic dishwashers, in the recommended amount.
  3. Wipe up any rinse-aid spills immediately.
  4. If a water softener is causing sudsing, discontinue rinse aid use.

Replace a damaged door gasket

About 30 minutes · Difficulty 2/5

  1. Remove the old seal.
  2. Clean the channel with a mild cleaner.
  3. Press-fit a new OEM door gasket into the channel.
  4. Close the door for several hours to help the new seal settle.

Tighten or replace loose hose connections

About 30 minutes · Difficulty 2/5

  1. Shut off the household water supply before disconnecting any hose.
  2. Tighten loose hose clamps.
  3. Replace a worn or cracked water supply line or drain tube.

When to call a technician about a dishwasher leaking

  • Schedule professional service for a suspected cracked tub
  • Have a technician repair a worn pump/motor seal

Sources

  1. Dishwasher SP.. Instruction Manual, Bosch Home Appliances US (retrieved 2026-09-18)
  2. Dishwasher SMS6HAI01A User Manual, Bosch Home Appliances US (retrieved 2026-09-18)
  3. Dishwasher - Leaks or Floods Underneath, GE Appliances (retrieved 2026-09-18)
  4. Dishwasher - Leaking From Door, GE Appliances (retrieved 2026-09-18)
  5. Samsung DW6000J series dishwasher user manual, Samsung Electronics America (retrieved 2026-09-18)
  6. Samsung dishwasher is leaking or has a leakage error code, Samsung Electronics America (retrieved 2026-09-18)
  7. Dishwasher Leaking Troubleshooting Guide, Whirlpool Corporation (retrieved 2026-09-18)

Last updated September 30, 2026 · facts last verified September 19, 2026 · How we source and verify

Guidance only; follow your appliance manual and local codes. If anything looks unsafe, stop and call a qualified technician. Safety disclaimer