Why Does My Dishwasher Leak?

Jul 19, 2023, 15:26pm

The dishwasher mainly uses water to carry out its role, it is normal to detect some leaks or to observe stagnant water at the bottom of the tank. If there are leaks from the dishwasher even when stopped, this may indicate a fault in its solenoid valve / aquastop. It will therefore be necessary to first check if there is indeed a water inlet in the dishwasher.

There may also be leaks when the machine is running. This can happen during a drain, a cycle or the whole time of the wash cycle. This is why it will be necessary to carry out several checks on your device to find and understand the origin of the breakdown, as well as to remove the stagnant water.

  • Check the tap and siphon
  • Check the drain siphon
  • Check the spray arms
  • Check door seals
  • Examine the tightness of the front sheet
  • Check the sides
  • Observe the organs under the tank

A leaking dishwasher can be a frustrating problem that not only causes water damage but also disrupts your kitchen routine. There are several reasons why your dishwasher may be leaking, and understanding the cause is essential for resolving the issue. In this article, we will explore the common reasons why dishwashers leak and provide guidance on how to address them.

Why Does My Dishwasher Leak?

1. Door Seal Issues

One of the most common causes of dishwasher leaks is a faulty door seal. Over time, the door seal can become worn out, damaged, or misaligned, allowing water to escape during the wash cycle. To address this issue:

  1. Inspect the Door Seal: Examine the door seal for any visible signs of damage or wear, such as cracks or tears. Ensure that it is properly aligned and free from debris.
  2. Clean the Door Seal: Use a damp cloth to clean the door seal and remove any food particles, soap residue, or other debris that may be interfering with its effectiveness.
  3. Replace the Door Seal: If the door seal is significantly damaged or worn out, it may need to be replaced. Consult your dishwasher’s manual or contact the manufacturer for the correct replacement part and installation instructions.

2. Tub and Hose Connections

Leaks can also occur due to loose or damaged connections between the dishwasher tub and various hoses. Here’s what you can do:

  1. Check the Tub Gasket: Inspect the gasket that surrounds the dishwasher tub. Look for any signs of damage, wear, or debris. Clean or replace the gasket if necessary.
  2. Tighten Hose Connections: Ensure that all hose connections, such as the water supply hose and drain hose, are securely tightened. Use pliers if needed, but be careful not to overtighten and cause damage.
  3. Check for Damaged Hoses: Inspect the hoses for cracks, splits, or other signs of damage. If you notice any issues, replace the damaged hoses with new ones.
  4. Examine the Drain Pump: Check the drain pump and its connections for any leaks or loose fittings. Tighten the connections or replace the pump if necessary.

3. Improper Loading or Overloading

Improper loading or overloading the dishwasher can lead to leaks. When dishes and utensils obstruct the spray arms or prevent the door from closing properly, water can escape. To prevent this:

  1. Arrange Dishes Properly: Ensure that dishes and utensils are placed in the dishwasher without blocking the spray arms. Leave enough space between items for proper water circulation.
  2. Avoid Overloading: Do not overload the dishwasher beyond its recommended capacity. Follow the manufacturer’s guidelines for loading to prevent water from splashing out during the wash cycle.

4. Float Switch or Float Assembly Issues

The float switch or float assembly is responsible for monitoring the water level in the dishwasher. If these components are faulty or malfunctioning, they may cause water to overflow and leak. Consider the following steps:

  1. Clean the Float Assembly: Locate the float assembly, typically located at the bottom of the dishwasher. Remove any debris or food particles that may be preventing it from moving freely.
  2. Test the Float Switch: Use a multimeter to test the float switch for continuity. If it fails the test, replace the float switch with a new one.

5. Professional Assistance

If you have checked all the above possibilities and the dishwasher still leaks, it is advisable to seek professional assistance. An experienced appliance technician can diagnose and repair complex issues that may require specialized knowledge or tools.


Wash arms, or spray arms, spray the dishwasher with jets of water and angled rotation. If nothing hinders them to turn during washing, then it is necessary to check if the holes are not blocked.

Simply disengage the wash arms then pass them under water, shaking them to remove foreign bodies.


To identify the leak, you will need to remove the top and sides of the dishwasher. This will allow you to check the tightness of the tank, the water box and the water pipes and to change one of these elements if there is indeed a leak.

  • Disassemble the 2 sides: the screws are generally located on the edge of the front side, behind or above.
  • Then inspect both sides with a lamp for any leaks.
  • Start a program with the sides removed if needed.

Why Does My Dishwasher Leak?


You will now have to look under the device to identify the leak responsible for the presence of stagnant water. To do this, remove the receiving plate, it is generally screwed at its four ends. Also remember to remove the float attached to it.

You will need to check if the following organs are not damaged. If so, they will need to be changed:

  • hoses and clamps
  • the drain pump
  • the circulation pump
  • the pressure switch
  • the flow meter
  • diverter valve

In conclusion, a leaking dishwasher can be caused by various factors, including door seal issues, loose or damaged hose connections, improper loading, float switch problems, and more. By following the troubleshooting steps outlined in this article, you can identify and resolve many of these issues. However, if the problem persists or you are unsure about performing any repairs yourself, it is best to consult a professional technician for further assistance. They will help diagnose the underlying cause of the leak and provide the appropriate solution, ensuring your dishwasher operates efficiently without any leaks.