LG Dishwasher AE Error: Leak Sensor Triggered

The AE (or E1) error code is LG’s leak detection alert. When triggered, it means the float sensor in the base pan has detected water where it shouldn’t be—a potentially serious issue that can cause water damage if ignored.

What the AE Error Code Means

When your LG dishwasher displays AE:

• The leak detection float has risen, indicating water in the base
• The AquaStop system has engaged to prevent further flooding
• The dishwasher will not operate until the water is removed
• There’s likely an active or recent leak

This is a protective feature, but the underlying leak must be found and fixed.

Model Coverage

This guide applies to LG dishwashers with leak detection displaying AE:

• LG front-control dishwashers with AquaStop
• LG top-control dishwashers with leak detection
• Models manufactured 2016-2024

Common Causes

1. Door seal leak (most common)
2. Excessive suds from wrong detergent (never use regular dish soap)
3. Using more than one detergent pod per cycle
4. Dishwasher not level
5. Loose internal hose connection
6. Cracked spray arm
7. Pump seal leak
8. Tub crack or damage
9. Overfilling due to inlet valve issue

Step-by-Step Fix

Step 1: Stop Operation Immediately

1. Cancel any running cycle
2. Turn off the dishwasher
3. Unplug it or turn off the circuit breaker
4. Turn off the water supply under the sink

Step 2: Check for Visible Leaks

Before moving the dishwasher:

1. Check the floor around and under the unit
2. Look for water trails indicating leak location
3. Check if water is coming from the door area

Step 3: Inspect the Door Seal

The door gasket is a common leak source:

1. Open the door fully
2. Examine the rubber gasket around the entire door opening
3. Look for cracks, tears, warping, or stiffness
4. Check for debris caught in the seal
5. Clean the gasket with a damp cloth
6. Feel for areas that seem loose or don’t seal properly

Step 4: Check for Suds Overflow

Using the wrong detergent can cause AE errors:

1. Look inside the tub for excessive suds
2. Regular dish soap creates far too many suds
3. Only use dishwasher-specific detergent
4. Reduce detergent amount if suds are visible
5. Run a rinse cycle with no detergent to clear suds

Step 5: Drain the Base Pan

Water must be removed from the base pan:

Method 1: Tilting (requires help)

1. Get a helper—the dishwasher is heavy
2. Place towels on the floor in front
3. Carefully tilt the dishwasher forward
4. Water will drain from the base pan area
5. Hold for 30-60 seconds until water stops
6. Return to level position

Method 2: Access Panel (if equipped)

Some models have a lower access panel:

1. Remove the screws holding the lower panel
2. Place towels and a shallow pan underneath
3. Some water may drain naturally
4. Use a sponge or wet/dry vacuum for remaining water

Step 6: Allow to Dry

After draining:

1. Leave the dishwasher unplugged
2. Keep the door open
3. Allow 24-48 hours for the base to dry completely
4. The float switch will not reset until the base pan is fully dry
5. Using a fan pointed at the base area can speed drying

Step 7: Test Carefully

Once dried:

1. Restore power
2. Run a short cycle WITHOUT dishes
3. Watch the door seal area for dripping
4. Listen for unusual water sounds
5. Check under the unit during and after the cycle

Finding the Leak Source

If the AE error returns, you need to identify the leak:

Door Seal Test

1. Close the door on a dollar bill
2. Try to pull the bill out—should have resistance
3. Test multiple points around the door
4. Weak resistance indicates a seal problem

Internal Leak Check

Requires pulling out the dishwasher:

1. Unplug and turn off water
2. Carefully slide the dishwasher out
3. Remove the lower access panel
4. Look for water stains or mineral deposits
5. Check hose connections, pump area, and tub bottom
6. Run a cycle and observe for leaks from below

Safety Warnings

• Water and electricity are dangerous together
• Always unplug before accessing internal components
• If you see active water near electrical parts, do not touch
• Get help when tilting—dishwashers weigh 80-100 lbs
• Don’t repeatedly run the dishwasher hoping AE clears itself

When to Call a Tech

Contact a professional if:

• AE returns after draining and drying
• You can’t find the leak source
• The leak is internal (pump, tub, internal hoses)
• Door seal replacement is needed
• Water damage has already occurred

Internal leaks typically require professional diagnosis and repair.

Sources

For official LG support:

• LG AE/E1 Error Code - Dishwasher

Related Guides

• LG Dishwasher Error Codes Explained
• OE Error: Drain Problems Solved
• IE Error: Water Inlet Troubleshooting