LG Dishwasher nE Error Code: Troubleshooting... | appliancefaults.com

Technical Background:

The nE error code in LG dishwashers typically indicates a problem with the multi-motion spray arm system. The main control unit (MCU) monitors the operation of the spray arm motor. If the MCU detects that the spray arm is not rotating as expected, either due to a physical obstruction, motor failure, or wiring issue, it will trigger the nE error code. The voltage path typically involves the MCU sending a 120V AC signal to the spray arm motor via a wiring harness.

Symptoms:

The homeowner reports the dishwasher displays an 'nE' error code on the control panel. The multi-motion spray arm may not be rotating or spinning correctly, or at all, during the wash cycle. Dishes in the upper rack might not be cleaned thoroughly.

Possible Causes:

Multi-Motion spray arm is physically obstructed, preventing rotation.
Faulty multi-motion spray arm motor.
Wiring harness issue between the control board and the spray arm motor.
Defective main control board (MCU).
Low water pressure affecting spray arm operation.
Clogged or restricted water supply to the spray arm.

Solution:

1

Turn off the dishwasher and disconnect power at the breaker panel.
2

Inspect the multi-motion spray arm for any obstructions (utensils, food particles) that may be hindering its rotation. Remove any obstructions.
3

Using a multimeter, check the voltage at the multi-motion spray arm motor connector. You should measure approximately 120V AC when the dishwasher is attempting to activate the spray arm. If no voltage is present, proceed to step 4.
4

Inspect the wiring harness between the control board and the multi-motion spray arm motor for any signs of damage (frayed wires, loose connections). Repair or replace the harness as needed.
5

If the wiring and voltage are confirmed, test the multi-motion motor resistance using a multimeter. Refer to the service manual for the correct resistance range. An open or shorted motor needs replacement.
6

If the motor receives voltage and is not mechanically blocked and its resistance is out of range, replace the multi-motion motor with a new one.
7

As a last resort, if all other components test okay, the main control board (MCU) may be faulty. Replace the main control board.

Safety Warning:

Always disconnect power to the dishwasher at the breaker panel before performing any repairs. Use Lock-Out/Tag-Out (LOTO) procedures to prevent accidental re-energization. High voltage (120V AC) is present in the dishwasher, posing a shock hazard.

Prevention:

• Regularly inspect the spray arm for obstructions and remove any food particles or debris.
• Ensure adequate water pressure to the dishwasher.
• Avoid overloading the dishwasher, which can lead to items blocking the spray arm.

Expert Tip:

To access the LG dishwasher's service mode, simultaneously press and hold the 'Rinse' and 'Power' buttons for 3 seconds. This can provide additional diagnostic information about the nE error and other system functions.

Frequently Asked Questions

•How do I determine the correct resistance range for the multi-motion spray arm motor?

Refer to the LG dishwasher's service manual for the specific model. The manual contains detailed electrical specifications, including the resistance range for the spray arm motor.

•Where is the main control board located in the dishwasher?

The main control board is typically located behind the control panel, usually accessible by removing the outer door panel and the control panel assembly.

•What is the minimum water pressure required for the dishwasher to operate correctly?

The minimum water pressure should be around 20 PSI. Low water pressure can affect the performance of the spray arms and trigger error codes.

LG Dishwasher nE Error Code: Troubleshooting Multi-Motion Spray Arm Issues

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I determine the correct resistance range for the multi-motion spray arm motor?

•Where is the main control board located in the dishwasher?

•What is the minimum water pressure required for the dishwasher to operate correctly?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: