Dishwasher Leaking Water

Why Your Dishwasher Is Leaking Water

Water on the kitchen floor from your dishwasher should be addressed promptly — standing water can damage flooring and subfloor, and reach units below in apartment buildings. Most leaks have a straightforward cause.

Most Common Causes

1. Worn or Damaged Door Gasket

The door gasket (also called the door seal) runs around the inside edge of the door frame. When it cracks, hardens, or gets a food build-up, it stops forming a watertight seal.

How to check:

• Open the door and run your fingers along the entire rubber gasket
• Look for visible cracks, tears, flattened sections, or areas that have pulled away from the channel
• Clean the gasket with a damp cloth — grease and debris can prevent a proper seal
• If the gasket is cracked or deformed, it needs to be replaced

This is one of the most common causes of dishwasher leaks.

2. Overfilling — Too Much Detergent or Wrong Detergent Type

Using regular dish soap instead of dishwasher detergent causes excessive suds that overflow through the door.

How to check:

• Open the dishwasher mid-cycle — if there are large amounts of suds, detergent is the issue
• Use only detergent specifically labeled for automatic dishwashers
• Follow the fill line on the detergent dispenser — more is not better
• If suds are present, run a rinse-only cycle with no detergent to clear them

3. Loose or Cracked Water Inlet Hose

The water inlet hose connects your household water supply to the dishwasher. A loose connection or hairline crack causes dripping under the sink or at the back of the machine.

How to check:

• Pull the dishwasher out slightly or look under the sink
• Inspect the hose where it connects to the water valve on the dishwasher and to the supply line
• Look for water stains, mineral deposits, or visible cracks along the hose
• Tighten loose connections by hand — do not overtighten

A cracked hose needs replacement.

4. Faulty Door Latch or Hinge

If the door doesn't close squarely or the latch doesn't hold it firmly against the tub, water can escape during the wash cycle.

How to check:

• Inspect the door latch for wear or damage
• Check that the door sits flush against the tub when fully closed
• Look at the door hinges — worn hinges can cause the door to sag and break the gasket seal
• Run the dishwasher and watch the door edge for drips during the wash cycle

5. Leaking Pump or Pump Seal

The pump circulates water through the spray arms. A worn pump seal or cracked pump housing allows water to escape underneath the unit.

Signs of a pump leak:

• Water appears under the center of the dishwasher, not the door
• Leak only occurs during the wash cycle when the pump is running
• You may hear a new grinding or rubbing noise

A pump seal leak requires professional repair.

6. Cracked Tub or Spray Arm

Older dishwashers can develop hairline cracks in the plastic tub or spray arms. Cracks in the tub are rare but can happen after years of use or if hard objects were dropped inside.

How to check:

• Remove the lower rack and inspect the tub floor and side walls
• Inspect the spray arms for cracks or damage
• Check that the spray arm center nut is tight and the arm spins freely

A cracked tub typically means the dishwasher should be replaced rather than repaired.

Step-by-Step Troubleshooting

1. Confirm you're using dishwasher-specific detergent and not overfilling the dispenser
2. Inspect the door gasket for damage or debris — clean and check for seal integrity
3. Run the machine and watch the door edge for leaks during the cycle
4. Check under the sink for dripping from the inlet hose connections
5. Look underneath the unit for water pooling at the center (pump area)
6. If the leak source is unclear, run with the door open slightly at the start to see where water escapes

Immediate Steps If Your Dishwasher Floods the Kitchen

• Turn off the water supply valve under the sink
• Switch off the dishwasher at the circuit breaker
• Remove standing water with towels — do not use a vacuum unless it's rated for water
• If you're in a multi-unit building, notify your building superintendent immediately — water travels through floors quickly

Error Codes to Watch For

| Code | Common Meaning | |------|---------------| | AE / E6 / i10 | Water leak detected by flood sensor | | E15 (Bosch) | Water in the base tray — anti-flood protection triggered | | LE / E9 | Water leak / water level error |

Refer to your appliance manual for brand-specific codes.