How to Test and Replace a Dishwasher Cycling Pump

The cycling pump, or circulation pump, is the part that draws in water and propels it through the wash arms.

The circulation pump is easily identifiable among the other parts of the dishwasher: it has the shape of a snail. The part consists of an engine and a turbine. The device is powered by electricity, it sucks up water and propels it towards the wash arms.

Symptoms of a malfunctioning circulation pump are:

• The total absence of emptying.
• A random evacuation.
• The pump makes an unusual noise during the drain cycle.
• Your dishwasher is leaking.
• A problem occurs when switching on the device.

The circulation pump is inside the dishwasher. It is accessed through the lower panel, below the machine.

The cycling pump in a dishwasher plays a crucial role in circulating water and ensuring effective cleaning of your dishes. If you notice issues such as poor cleaning performance, noisy operation, or water not draining properly, the cycling pump may be the culprit. Testing and replacing the cycling pump can help restore your dishwasher’s functionality. In this article, we will guide you through the process of testing and replacing a dishwasher cycling pump.

Testing the Dishwasher Cycling Pump

Before replacing the cycling pump, it’s important to determine whether it is indeed the cause of the problem. Follow these steps to test the cycling pump:

1. Safety Precautions: Ensure that the dishwasher is unplugged or disconnected from its power source to avoid any electrical accidents.
2. Access the Cycling Pump: Locate the cycling pump in your dishwasher. It is typically located at the bottom of the appliance, near the drain.
3. Inspect for Clogs: Check the cycling pump for any debris, clogs, or obstructions that may be affecting its operation. Remove any visible debris, ensuring that the pump is clear and unobstructed.
4. Test for Power: Connect the dishwasher to its power source. Start a dishwasher cycle and listen for the sound of the cycling pump running. If you don’t hear any sound or if the pump is not running, it may indicate a power issue. In this case, check the wiring connections and the dishwasher’s control board for any faults.
5. Check for Water Flow: Open the dishwasher door during a cycle and observe the water flow inside the dishwasher. If there is no or minimal water flow, it may suggest a problem with the cycling pump or the water inlet valve. In such cases, further testing and inspection are necessary.
6. Measure the Pump’s Impeller Resistance: Disconnect the dishwasher from its power source again. Use a multimeter set to resistance mode and carefully measure the resistance across the terminals of the cycling pump. Consult the dishwasher’s manual or manufacturer for the specific resistance range that indicates a functioning pump. If the resistance is outside the acceptable range, it suggests a faulty pump that needs to be replaced.

Replacing the Dishwasher Cycling Pump

If you have determined that the cycling pump is faulty and needs to be replaced, follow these steps to change it:

1. Safety Precautions: Ensure the dishwasher is completely disconnected from its power source.
2. Access the Cycling Pump: Locate the cycling pump in your dishwasher. It is typically located at the bottom of the appliance, near the drain.
3. Disconnect the Pump: Carefully disconnect the wiring connections and hoses attached to the cycling pump. Take note of the wire placement or take a photo for reference when connecting the new pump.
4. Remove the Old Pump: Depending on the design of your dishwasher, the pump may be attached with screws or clips. Remove these fasteners to detach the old cycling pump from the dishwasher.
5. Install the New Pump: Position the new cycling pump in place, aligning it with the mounting holes or clips. Secure it using the appropriate screws or clips as per the manufacturer’s instructions.
6. Reconnect the Wiring and Hoses: Connect the wiring and hoses to the corresponding terminals on the new cycling pump, ensuring they are secure and properly aligned.
7. Test the New Pump: Reconnect the dishwasher to its power source and run a dishwasher cycle to test the functionality of the new cycling pump. Listen for the sound of the pump running and check for proper water flow during the cycle.
8. Monitor for Leaks: During the test run, closely monitor the area around the new pump for any signs of leaks. If you notice any leaks, turn off the dishwasher and check the connections to ensure they are properly sealed.

If you are unsure about replacing the cycling pump yourself or if you encounter any difficulties during the process, it is recommended to consult a professional appliance technician. They have the expertise and tools necessary to safely and effectively replace the pump.

By following these steps, you can test and replace a dishwasher cycling pump, restoring proper water circulation and improving the dishwasher’s performance. Remember to prioritize safety throughout the process by disconnecting the dishwasher from its power source and taking necessary precautions to avoid electrical accidents.