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

Technical Background:

The AE error code on LG dishwashers typically indicates a leak or overfill condition detected by the pressure sensor. The Main Control Unit (MCU) monitors the water level via the pressure sensor. If the sensor detects an abnormally high water level or a leak, it sends a signal to the MCU, which then displays the AE error and may trigger the drain pump. Voltage paths from the sensor to the MCU must be continuous for proper operation.

Symptoms:

The LG dishwasher displays the AE error code and leaks water from the front. The dishwasher may also overfill or fail to drain properly.

Possible Causes:

Water inlet valve malfunction
Pressure sensor failure
Drain pump issue
Water overfill
Leak in the sump area

Solution:

1

Disconnect power to the dishwasher at the breaker panel. Verify with a multimeter that the 120V AC power is off.
2

Inspect the water inlet valve for cracks or damage. Use a multimeter to test the valve solenoid for continuity. Replace the valve if the solenoid shows open circuit or is physically damaged.
3

Check the pressure sensor connection and wiring harness. Disconnect the sensor and test its resistance using a multimeter. Compare the reading to the manufacturer's specifications. Replace the sensor if faulty.
4

Examine the drain pump for clogs or obstructions. Remove the pump and inspect the impeller for damage. Manually turn the impeller to ensure free movement. Test the pump windings for continuity.
5

Inspect the sump area for leaks or cracks. Use a flashlight to thoroughly inspect the sump and surrounding components. Replace the sump if necessary.
6

Level the dishwasher using a bubble level. Adjust the leveling legs as needed to ensure proper drainage.
7

Reconnect power and run a test cycle. Monitor for leaks and proper operation.

Safety Warning:

Disconnect power to the dishwasher at the breaker panel before performing any repairs. Lock Out / Tag Out (LOTO) procedures should be followed to prevent accidental energization. This appliance operates with 120V AC, which can cause electrocution.

Prevention:

Regularly clean the dishwasher filter to prevent clogs. Use appropriate dishwasher detergent and rinse aid. Check the door seal for damage and replace if necessary. Annually inspect hoses for cracks or leaks.

Expert Tip:

LG dishwashers often have a service mode. Refer to the service manual for your specific model to access diagnostic tests and error code history. It often involves pressing a combination of buttons (e.g., Rinse + Power) simultaneously for a few seconds.

Frequently Asked Questions

•How do I access the dishwasher's diagnostic mode?

The diagnostic mode varies by LG model. Consult the service manual for your specific model. A common method involves pressing a combination of buttons such as 'Rinse' and 'Power' simultaneously for several seconds until the display changes.

•What is the correct resistance reading for the pressure sensor?

The resistance reading for the pressure sensor varies depending on the specific model and pressure level. Consult the service manual for your dishwasher to find the correct specifications.

•Where is the water inlet valve located on my LG dishwasher?

The water inlet valve is typically located at the lower rear of the dishwasher, where the water supply hose connects. You may need to remove the lower access panel to see it.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the dishwasher's diagnostic mode?

•What is the correct resistance reading for the pressure sensor?

•Where is the water inlet valve located on my LG dishwasher?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: