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LG Dishwasher AE Code: Causes, Fixes and How to Reset It

Technically Reviewed by Oleg Chudnovski on September 15, 2026 | Written by Spark Service PRO Editorial Contributors

The AE code on an LG dishwasher usually means the appliance has detected a possible water leak. When water collects where it shouldn't, the dishwasher's leak detection system may activate and stop the normal wash cycle to prevent further water damage.

The cause may be a leaking hose, door seal, pump, excess suds, or another issue inside the dishwasher. In some cases, the LG dishwasher AE code can appear even without a visible leak. Understanding what triggers this error can help you find the cause and determine whether you can fix it yourself or need professional repair

What Does the AE Error Code Mean?

The AE error code on an LG dishwasher indicates that the leak detection system has detected water or excessive moisture where it should not be. As a safety measure, the dishwasher may stop the wash cycle and activate the drain pump to help prevent further leaking or water damage.

Common causes of the AE code include excess suds, a leaking hose or pump, a damaged door seal, improper drainage, or water collecting in the dishwasher base. Finding the source of the problem is the first step toward clearing the error and getting your dishwasher working normally again.

Why the Float Switch Activates

The float switch is part of the LG dishwasher's leak protection system. When water collects in the dishwasher base, the float rises and activates the switch. This signals the dishwasher to stop normal operation and may trigger the drain pump to help prevent further water damage.

An internal leak, a damaged hose or seal, excess suds, an overflowing dishwasher, or water collected in the base for another reason can activate the float switch.

What Triggers the LG Dishwasher AE Error Code

Several issues can trigger the AE error code on an LG dishwasher, from simple problems like excess suds to internal leaks or faulty components. Identifying the cause matters because the right solution depends on where the water or moisture is coming from.

The table below covers the most common causes of the LG dishwasher AE code and what to look for when troubleshooting.

Fixing the LG dishwasher AE error code starts with identifying what caused the leak detection system to activate. Begin with simple checks, such as looking for excess suds, visible leaks, drainage problems, or a damaged door seal. If the AE code returns, the dishwasher may have an internal leak or a component that requires further inspection.

Regular cleaning, proper detergent use, and checking for early signs of leaks can help prevent the AE error from returning. If you cannot locate the source of the problem or the code keeps coming back, it may be time to contact an experienced LG appliance repair technician.

In our experience, an AE code should not be treated as something you simply reset and ignore. If the code comes back, there is usually a reason the leak protection system was activated. Finding the source of the water is more important than just clearing the error., - SEO, Spark Service PRO Oleg C.

How to Fix the LG Dishwasher AE Error Code

To fix the AE error code on an LG dishwasher, start by checking for signs of a water leak, excess suds, drainage problems, or water collecting underneath the dishwasher. Because the AE code relates to the leak detection system, resetting the appliance may clear the code temporarily without fixing the underlying problem.

If you don't see a leak and the basic checks don't reveal an obvious cause, you can try resetting the dishwasher before moving on to more detailed troubleshooting. Here's how to reset an LG dishwasher:

Step 1: Reset the Dishwasher

Performing a hard reset on an LG dishwasher is easier than it sounds. Simply disconnect the appliance from its power source for about a minute. This power break can reset the system and clear temporary errors. After a minute, reconnect the power to see whether the AE message on the LG dishwasher has cleared.

If the LG dishwasher AE code no leak persists after the reset, it’s time to dig deeper into the dishwasher's anatomy to find the source of the trouble.

Step 2: Check the Drain Pan for Water

Sometimes, the issue is the drain pan, which can accumulate water from a leak or a spill during loading. Inspect this area for standing water and remove it if you find any. Checking the pan is a crucial step to ensure no residual moisture triggers the sensor.

Step 3: Reduce or Change Your Detergent

The type of detergent you use can affect your dishwasher's performance. Too much soap or using the wrong type can create excess suds, leading to leaks or sensor triggers. Consider switching detergents or adjusting the amount you use to see whether it resolves the issue.

If the initial steps don’t resolve the LG dishwasher AE code, several components may need attention. These include the spray arms, door gasket, and water inlet valve, among others.

Step 4: Inspect and Clean Spray Arms

The spray arms play a key role in your dishwasher's operation by distributing water throughout the unit. Clogged spray arms can cause improper water flow and leaks. Inspect and clean the arms to ensure they work properly.

Step 5: Examine the Door Gasket

The door gasket seals the door to prevent water from leaking out. Over time, it can wear down or become damaged, allowing water to escape. Examining and replacing the worn door gasket is an essential step in leak prevention. If you don’t know how to do this correctly, contact our certified appliance repair service in Toronto and across the Greater Toronto Area.

Step 6: Test the Water Inlet Valve

This valve controls the flow of water into your dishwasher. If it's faulty, it can let in too much water, causing overflows, or restrict water flow, affecting the dishwasher's performance. Testing the valve with a multimeter can help determine if it's functioning as intended.

Step 7: Inspect the Float Switch Assembly

The float sensor monitors the water level in your dishwasher. If it's not working correctly, it might falsely detect a leak or fail to detect one, causing the AE error code. Inspecting and testing this sensor are crucial parts of the LG dishwasher AE code reset process.

Step 8: Check the Control Panel or PCB

The control panel, the brain of your dishwasher, could be the culprit. If the panel malfunctions, it may display the AE error code even without a leak. A certified dishwasher technician should inspect it to rule out or confirm control panel issues.

Step 9: Check for Internal Tub Leaks or Cracks

Any cracks in seams, in the tub, or around mounting points of your dishwasher, even insignificant ones, can cause minor leaks that trigger the AE code. Use a flashlight to inspect the bottom of the appliance for any issues.

Step 10: Inspect the Circulation Pump and Hoses for Leaks

Lastly, check the hoses for leaks and inspect the circulation pump, as water can drip into the standing water pan and trigger the AE error. To detect the pump seal leak, check for moisture or water damage around the pump.

When to Call a Professional LG Dishwasher Technician

If the LG dishwasher AE error code keeps returning after basic troubleshooting, you may have an internal leak or a problem with the pump, inlet valve, hoses, seals, leak sensor, or another component that requires professional diagnosis.

Spark Service PRO provides professional LG dishwasher repair in Toronto and across the GTA. Our experienced technicians diagnose LG dishwasher error codes, locate leak sources, and complete repairs using manufacturer-approved parts when available.

If your LG dishwasher is showing an AE code and you cannot find the cause, contact Spark Service PRO to book a service appointment. Same-day dishwasher appliance repair may be available depending on your location and technician availability.