LG Dishwasher AE Error Code: Troubleshooting Leaks and... | appliancefaults.com

Technical Background:

The AE error code in LG dishwashers typically indicates a water leak or a water level issue. The Main Control Unit (MCU) monitors the water level through sensors like a float switch or a pressure sensor. If the MCU detects an abnormally low water level or continuous draining, it triggers the AE error. The voltage path from the sensor to the MCU is critical for proper operation; any breaks or shorts in this circuit can cause the error.

Symptoms:

The LG dishwasher displays an 'AE' error code on the control panel. The dishwasher may or may not fill with water properly. Water may be leaking from the dishwasher. The drain pump might be running constantly.

Possible Causes:

Leaks in the dishwasher tub or sump area.
Faulty water inlet valve not closing completely.
Defective float switch or pressure sensor.
Drain pump running continuously, causing low water level.
Wiring harness damage affecting water level sensor circuit.

Solution:

1

Disconnect power to the dishwasher at the breaker panel.
2

Inspect the dishwasher tub and sump area for visible cracks or leaks. Use a flashlight for better visibility.
3

Check the water inlet valve for proper closing. If it's dripping when it should be closed, replace the valve.
4

Locate the float switch or pressure sensor. Test its continuity with a multimeter. A faulty sensor will need replacement.
5

Examine the drain pump. If it runs continuously, even when the dishwasher is off, replace the pump.
6

Inspect the wiring harness connected to the water level sensor for any damage or loose connections. Repair or replace as needed. Use a 1/4-inch nut driver to access the control panel if necessary.
7

Restore power and run a test cycle to confirm the AE error is resolved.

Safety Warning:

Always disconnect power to the dishwasher at the breaker panel before performing any repairs. Dishwashers operate on 120V AC. Lock Out Tag Out (LOTO) procedures must be followed to prevent accidental energization.

Prevention:

Regularly inspect the dishwasher for leaks. Clean the float switch area to prevent debris buildup. Use dishwasher cleaner monthly to prevent clogs and maintain proper drainage.

Expert Tip:

After replacing the water inlet valve, run the dishwasher through its diagnostic cycle (consult the service manual for the specific sequence for your model) to recalibrate the water level sensor and ensure proper operation. Often involves pressing a specific button combination 3 times rapidly.

Frequently Asked Questions

•Where is the float switch located in my LG dishwasher?

The float switch is usually located at the bottom of the dishwasher tub, near the sump area. It's often covered by a protective cage.

•How do I test the water inlet valve with a multimeter?

Disconnect power and then disconnect the wires to the inlet valve. Set your multimeter to ohms (resistance). You should typically see a resistance reading between 500 ohms and 1500 ohms. An open circuit indicates a faulty valve.

•What type of sealant should I use to repair a small crack in the dishwasher tub?

Use a food-grade, high-temperature silicone sealant specifically designed for appliance repair. Ensure the area is clean and dry before applying the sealant.

LG Dishwasher AE Error Code: Troubleshooting Leaks and Cracks

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where is the float switch located in my LG dishwasher?

•How do I test the water inlet valve with a multimeter?

•What type of sealant should I use to repair a small crack in the dishwasher tub?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: