LG Dishwasher nE Error Code: Diverter Motor Replacement... | appliancefaults.com

Technical Background:

The nE error code on an LG QuadWash dishwasher typically indicates a problem with the diverter motor or the diverter valve system. The Main Control Unit (MCU) sends voltage to the diverter motor to switch the water flow between the upper, lower, and QuadWash spray arms. If the MCU doesn't receive confirmation that the diverter valve has moved as commanded, it will generate the nE error. Voltage paths can be traced using the service manual schematic for the specific model.

Symptoms:

The US homeowner observes the dishwasher displaying an 'nE' error code. The QuadWash spray arms may not be functioning correctly, resulting in poor cleaning performance. Cycles may be longer than usual, or the dishwasher may stop mid-cycle.

Possible Causes:

Faulty diverter motor
Obstruction in the diverter valve
Wiring harness issue between the MCU and diverter motor
Defective Main Control Unit (MCU)
Low voltage to the diverter motor circuit
Stuck or misaligned QuadWash arm

Solution:

1

Disconnect power to the dishwasher at the breaker panel. Lock out/tag out the breaker.
2

Access the diverter motor located beneath the wash pump assembly. You'll likely need a 1/4-inch nut driver to remove the lower access panel.
3

Disconnect the wiring harness from the diverter motor. Use a multimeter to check for 120V AC when the dishwasher is attempting to switch wash arms.
4

Check the diverter motor winding resistance. A typical reading is between 50-150 ohms. An open or shorted winding indicates a faulty motor.
5

Inspect the diverter valve for any obstructions. Clear any debris that may be preventing the valve from moving freely.
6

If the motor and valve are clear, replace the diverter motor with a new, OEM part.
7

Reconnect the wiring harness and power to the dishwasher. Run a test cycle to verify the nE error is resolved and the QuadWash arm is functioning correctly.

Safety Warning:

Disconnect power to the dishwasher at the breaker panel before performing any repairs. Lock out/tag out the breaker to prevent accidental re-energization. This appliance operates with 120V AC which can cause serious injury or death.

Prevention:

Run a dishwasher cleaner through the unit monthly to prevent mineral buildup and obstructions. Ensure proper loading techniques to avoid blocking the spray arms. Periodically check the spray arms for clogs.

Expert Tip:

After replacing the diverter motor, run the dishwasher through the service diagnostic mode to recalibrate the diverter valve position. This ensures optimal performance. To enter service mode, simultaneously press and hold the 'Rinse' and 'Power' buttons for 3 seconds. Follow the service manual instructions for diverter motor calibration.

Frequently Asked Questions

•What is the correct resistance range for the diverter motor on this specific LG QuadWash model?

Refer to the service manual for the exact resistance specification for your LG QuadWash model. However, a typical range is between 50-150 ohms.

•How do I confirm the MCU is sending the correct voltage to the diverter motor?

Using a multimeter, check for 120V AC at the diverter motor wiring harness when the dishwasher is attempting to switch between spray arms. If voltage is present but the motor isn't working, the motor is likely faulty. If voltage is absent, the MCU or wiring harness may be the issue.

•Where can I find the service manual and parts list for my LG QuadWash dishwasher?

The service manual and parts list can usually be found on the LG website, appliancepartspros.com, or searspartsdirect.com. Make sure to have your model number handy.

LG Dishwasher nE Error Code: Diverter Motor Replacement Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the correct resistance range for the diverter motor on this specific LG QuadWash model?

•How do I confirm the MCU is sending the correct voltage to the diverter motor?

•Where can I find the service manual and parts list for my LG QuadWash dishwasher?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: