LG Dishwasher OE Error Code: Troubleshooting Water in... | appliancefaults.com

Technical Background:

The OE error indicates an overflow condition detected by the dishwasher's control unit (MCU). The MCU monitors the water level via the pressure switch. If the water level exceeds the set limit, the MCU triggers the drain pump and displays the OE error. Voltage paths include 120V AC to the water inlet valve and drain pump, controlled by relays on the main control board.

Symptoms:

The LG dishwasher displays an 'OE' error code and has standing water in the bottom after a wash cycle.

Possible Causes:

Drain pump failure or obstruction
Clogged drain hose
Faulty water inlet valve leaking
Defective pressure switch
Siphon issue due to incorrect drain hose system
Control board malfunction

Solution:

1

Disconnect power to the dishwasher at the breaker panel.
2

Inspect the drain hose for kinks or clogs. Disconnect the hose and check for obstructions.
3

Access the drain pump (usually at the bottom of the unit). Check for debris like food particles or glass. Use a shop vac to remove any obstructions.
4

Test the drain pump for continuity using a multimeter. A reading of approximately 15-30 ohms is expected. Replace if open or shorted.
5

Inspect the water inlet valve for leaks. If leaking, replace the valve.
6

Check the pressure switch and its associated hose for blockages. Ensure the switch is functioning correctly by testing continuity as the water level changes.
7

If all components test good, the control board may be faulty and require replacement.

Safety Warning:

Always disconnect power to the dishwasher at the breaker panel before performing any repairs. Lock Out/Tag Out (LOTO) procedures must be followed. The dishwasher contains 120V AC circuits. Exercise caution when working with electrical components.

Prevention:

Regularly clean the dishwasher filter and check the drain hose for kinks. Avoid overloading the dishwasher to prevent food debris from clogging the drain pump.

Expert Tip:

Many LG dishwashers have a service mode. To access it, simultaneously press and hold the 'Rinse' and 'High Temp' buttons for 3 seconds. This will allow you to run diagnostic tests on individual components.

Frequently Asked Questions

•How do I access the drain pump on my LG dishwasher?

The drain pump is typically located at the bottom of the dishwasher. You'll usually need to remove the lower access panel and possibly the kickplate. You might need a 1/4-inch nut driver or a Phillips head screwdriver. Refer to your dishwasher's service manual for specific instructions.

•What is the proper height for the dishwasher drain hose to prevent siphoning?

The drain hose should have a high loop, typically at least 20 inches above the floor. This prevents wastewater from siphoning back into the dishwasher. Ensure the hose is securely clamped to both the dishwasher and the drain connection.

•How do I test the pressure switch on my LG dishwasher?

Disconnect power to the dishwasher. Locate the pressure switch and disconnect its wiring. Use a multimeter to check for continuity while blowing gently into the pressure switch hose. The continuity should change when pressure is applied, indicating the switch is working correctly. If the switch shows no change in continuity, it's likely faulty.

LG Dishwasher OE Error Code: Troubleshooting Water in the Bottom

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the drain pump on my LG dishwasher?

•What is the proper height for the dishwasher drain hose to prevent siphoning?

•How do I test the pressure switch on my LG dishwasher?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: