LG Dishwasher overflowing: Common Causes & How to Fix

Repair Instructions:

The water inlet valve is an electronically controlled valve that opens up to let water flow into the LG dishwasher. Depending on the LG dishwasher model, the valve stays open for a specific duration or until the LG dishwasher has enough water. If the water inlet valve doesn't close after the LG dishwasher has enough water, it can cause the LG dishwasher to overflow. If you notice water dripping into the LG dishwasher when the door is open or if water accumulates at the bottom of the LG dishwasher when it's not in use, it might be necessary to replace the water inlet valve.

How to Replace LG Dishwasher Water Inlet Valve:

1. Safety Precautions:

   • Begin by ensuring the LG dishwasher is disconnected from the power source and water supply to guarantee your safety during the replacement process.

2. Access the Water Inlet Valve:

   • Locate the water inlet valve, typically found at the bottom of the LG dishwasher, behind the lower access panel.

3. Gather Necessary Tools and Replacement Parts:

   • Ensure you have the required tools, such as pliers and a screwdriver, and acquire a compatible replacement water inlet valve.

4. Disconnect Water Supply:

   • Turn off the LG dishwasher's water supply, which is usually located under the sink. Disconnect the water supply hose from the inlet valve.

5. Remove the Access Panel:

   • Use the screwdriver to remove the lower access panel of the LG dishwasher, providing access to the inlet valve.

6. Disconnect Wiring and Hoses:

   • Carefully disconnect the wiring and hoses attached to the old water inlet valve. Take note of their positions for reconnection.

7. Remove the Old Valve:

   • Gently detach the old water inlet valve from its mounting point, often secured with screws or mounting brackets.

8. Prepare the New Water Inlet Valve:

   • Unpack the replacement water inlet valve and inspect it for any defects. Ensure it is clean and free from any packaging materials.

9. Install the New Valve:

   • Carefully position the new water inlet valve in the same location as the old one, securing it with the original screws or mounting brackets.

10. Reconnect Wiring and Hoses:

    • Reconnect the wiring and hoses to the new water inlet valve, ensuring they are properly and securely attached.

11. Reattach the Access Panel:

    • Place the lower access panel back onto the LG dishwasher and secure it with the screws you removed earlier.

12. Turn On Water Supply:

    • Reconnect the water supply hose and turn on the LG dishwasher's water supply.

13. Plug In and Test:

    • Reconnect the LG dishwasher to the power source and run a test cycle to ensure the new water inlet valve functions correctly and no leaks are present.

14. Final Check:

    • Inspect the new water inlet valve and its connections to ensure they are properly installed, preventing any water supply issues during LG dishwasher operation.

Repair Instructions:

The main control board of a LG dishwasher supplies power to almost all of its electrical components. If the control board keeps providing power to the water inlet valve while the LG dishwasher is draining, it can lead to an overflow. Although this issue is not very common, you can examine the control board for any signs of burning or damaged components. You can also use a multimeter to test if the water inlet valve is receiving power during the LG dishwasher's cycle.

How to Replace LG Dishwasher Main Control Board

1. Disconnect power at circuit breaker. Turn off power to LG dishwasher before servicing.

2. Remove lower LG dishwasher panel. Find securing screws along bottom of LG dishwasher cavity.

3. Note wire connections to board. Take photos of positions for reconnection later.

4. Disconnect all wires from board. Gently detach each wire connection point by point.

5. Remove mounting screws from board. Typically 2-3 screws hold board securely in place.

6. Detach old board from mounting posts. Carefully lift out once fully disconnected.

7. Clean mounting area of any debris. Wipe surface where new control board will install.

8. Mount replacement control board. Set into position and start securing screws.

9. Reconnect wires one by one. Reference photos to precisely match wires and connectors.

10. Replace lower access panel removed earlier. Secure with screws.

11. Reconnect power and test functions. Run cycle while checking for proper operations.

Repair Instructions:

If you notice water splashing out from the bottom of the LG dishwasher door, it may be due to a crack or split on the side of the lower wash arm. This can create the false impression that the LG dishwasher is overflowing. To address this issue, carefully examine the wash arm assembly for any signs of damage. If you find a crack or split, it is recommended to replace the wash arm assembly as needed.

How to Replace LG Dishwasher Lower Wash Arm Assembly

1. Disconnect power to LG dishwasher at circuit breaker and remove lower basket.

2. Locate the lower wash arm assembly mounted on bottom of tub interior.

3. Depress retaining tabs and lift arm assembly up and out of mounting brackets.

4. Clean area at bottom of tub where new arm will attach.

5. Position replacement lower arm assembly into mounts.

6. Press down firmly until it clicks into locked position on retaining tabs.

7. Replace lower dishrack basket and any items.

8. Close LG dishwasher door and reconnect power.

9. Perform test cycle and check spray coverage from new lower arm.

10. Inspect final installation and ensure arm is stable during operation.

Repair Instructions:

The control board of a LG dishwasher supplies power to almost all of its electrical components. If the control board keeps providing power to the water inlet valve, it can cause the LG dishwasher to overflow. While this issue is not very common, you can examine the control board for any indications of burning or malfunctioning components.You can use a multimeter to test the water inlet valve and check if it is receiving power during the LG dishwasher's cycle.

How to Replace LG Dishwasher Control Board

1. Disconnect power at circuit breaker. Turn off power to LG dishwasher before servicing.

2. Remove lower access panel or kick panel. Find and remove securing screws along bottom.

3. Note positions of all wire connections to board. Take photos to reference during reconnection.

4. Disconnect all wires from old control board. Gently detach each wire one at a time.

5. Remove mounting screws from board enclosure. Usually 2-4 screws secure electronic board assembly.

6. Detach old control board from enclosure base. Carefully lift board out once fully disconnected.

7. Clean mounting area inside enclosure base. Wipe away any debris from new board mounting area.

8. Mount replacement control board into base. Set into position and start securing screws.

9. Reconnect wires one by one, matching positions. Reference photos to precisely reconnect wires.

10. Replace lower access panel removed earlier. Secure with screws.

11. Reconnect power and test functions. Run cycle while checking for proper operations.

Repair Instructions:

The float switch is an important component that prevents the LG dishwasher from overflowing. If the float switch is faulty or gets stuck, it may fail to stop the LG dishwasher from overflowing. You can test the float switch for continuity with a multimeter. If the part has failed you will need to replace it.

How to Replace LG Dishwasher Float Switch:

1. Safety First:

   • Before starting any work on your LG dishwasher, make sure to unplug it from the power source or shut off the circuit breaker to prevent electrical accidents.

2. Prepare the Workspace:

   • Empty the LG dishwasher and remove any items from the bottom rack.

3. Locate the Float Switch:

   • The float switch is typically found in the bottom of the LG dishwasher, usually beneath the lower rack. It resembles a small, round or rectangular device.

4. Access the Float Switch:

   • Carefully pull out the lower rack and set it aside to access the float switch easily.

5. Remove the Float Switch:

   • The float switch is often secured by a retaining clip or screws. Remove any fasteners that hold it in place.

6. Disconnect Wiring:

   • The float switch is connected to wiring. Take note of how these wires are connected before you disconnect them.

7. Replace with a New Float Switch:

   • Take your new float switch and attach it to the LG dishwasher in the same position and orientation as the old one.

8. Reconnect Wiring:

   • Reattach the wires to the new float switch. Make sure they are connected exactly as they were on the old switch.

9. Test the Float Switch:

   • Before reassembling the LG dishwasher, plug it back in or turn on the circuit breaker.
   • Fill the LG dishwasher with a small amount of water and observe the float switch's function. It should stop the water from filling when it reaches the correct level.

10. Reassemble the LG Dishwasher:

    • If the float switch works correctly, you can start reassembling the LG dishwasher.
    • Secure the float switch in its mounting position with the retaining clip or screws.

11. Test the LG Dishwasher:

    • Run a short LG dishwasher cycle with no dishes to verify that the float switch controls the water level properly and doesn't trigger any error codes.

12. Final Checks:

    • Listen for any unusual noises or vibrations during the cycle.
    • Make sure there are no leaks around the float switch area.
    • If everything looks and sounds good, you've successfully replaced the LG dishwasher float switch.

Repair Instructions:

The LG dishwasher pressure switch is an important part that tells the water inlet valve to close once enough water has entered the LG dishwasher for a wash cycle. If the pressure switch is not working properly, it may not send the signal to close the inlet valve, leading to an overflow. To check if the pressure switch is working correctly, you can use a multimeter to test for continuity. If the switch is shorted or fails the test, it should be replaced with a new one.

How to Replace LG Dishwasher Pressure Switch

1. Turn off power and water supply - Locate the circuit breaker for the LG dishwasher and turn it off. Also turn off the water supply line behind the LG dishwasher.

2. Remove lower panel - The pressure switch is usually located behind the lower front panel. Remove any screws or clips to take this panel off.

3. Disconnect wiring - The pressure switch will have wires connected to it. Note where they connect, then disconnect them.

4. Remove mounting screws - The pressure switch is mounted to the LG dishwasher with screws. Remove these to detach it.

5. Install new pressure switch - Line up the new pressure switch and screw it into place. Reconnect the wiring to the proper terminals.

6. Replace lower panel - Put the lower panel back on and secure with screws or clips.

7. Restore power and water - Turn the circuit breaker and water supply back on.

8. Test operation - Run a test cycle and check for leaks to verify proper operation. The LG dishwasher should fill and drain correctly.

Repair Instructions:

It is important to use the correct LG dishwasher detergent for best results. It is crucial to use the appropriate amount of detergent based on the hardness of your water. Using too much soap in soft water can lead to excessive suds and potential leaks.