LG Dishwasher OE Error Code: Troubleshooting After... | appliancefaults.com

Technical Background:

The OE error code typically indicates a drainage problem. The Main Control Unit (MCU) monitors the water level sensor and drain pump current. If the water level doesn't decrease within a specified time or the pump current is out of range, the MCU triggers the OE error, indicating a drain issue. Voltage to the drain pump should be 120V AC during the drain cycle.

Symptoms:

The LG dishwasher displays an OE error code during or after the wash cycle. The dishwasher may not drain properly, leaving standing water at the bottom.

Possible Causes:

Air gap blockage
Drain hose kink or obstruction
High loop system failure
Garbage disposal knockout plug still in place
Drain pump failure
Clogged drain filter

Solution:

1

Turn off the dishwasher and disconnect it from the power outlet.
2

Locate the garbage disposal and inspect for the knockout plug. Use a screwdriver and hammer to remove the plug if still present.
3

Check the air gap (if installed) for any blockages. Clean if necessary.
4

Inspect the drain hose for kinks or obstructions. Straighten or replace the hose as needed.
5

Verify the drain hose high loop is properly installed, securing it as high as possible under the sink.
6

Reconnect the dishwasher to the power outlet and run a test cycle. Monitor for the OE error.
7

If the error persists, check the drain pump. Disconnect power. Remove the lower access panel (1/4-inch nut driver). Disconnect the drain pump wires. Check pump winding resistance with a multimeter (should show a value, not open or shorted). Visually inspect the pump for debris.

Safety Warning:

Disconnect power to the dishwasher at the breaker panel before performing any repairs. High voltage (120V AC) is present in the dishwasher. Lock Out Tag Out (LOTO) procedures should be followed.

Prevention:

Regularly run the garbage disposal to prevent food buildup. Flush the dishwasher drain hose with hot water periodically. Clean the dishwasher drain filter after each use.

Expert Tip:

To enter service mode on some LG dishwashers, press and hold the 'Half Load' and 'Energy Saver' buttons simultaneously for 3 seconds. This allows you to run diagnostic cycles and check individual components.

Frequently Asked Questions

•How do I check the drain pump resistance with a multimeter?

Disconnect the dishwasher from power. Locate the drain pump, usually at the bottom. Disconnect the wires to the pump. Set your multimeter to Ohms. Place the probes on the pump terminals. A reading between 10-50 Ohms is typical. An open circuit or short circuit indicates a faulty pump.

•What is a high loop and why is it important?

A high loop is a section of the drain hose that is elevated as high as possible under the sink before connecting to the garbage disposal or drainpipe. It prevents wastewater from the sink from flowing back into the dishwasher, contaminating the dishes.

•Where is the dishwasher drain filter located?

The drain filter is typically located inside the dishwasher tub, at the bottom, under the spray arm. It's often a cylindrical filter that can be unscrewed and removed for cleaning.

LG Dishwasher OE Error Code: Troubleshooting After Garbage Disposal Install

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I check the drain pump resistance with a multimeter?

•What is a high loop and why is it important?

•Where is the dishwasher drain filter located?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: