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ErrBase

LG Dishwasher AE Error Code: Leak Detected

Quick Answer

LG's AE code uses a resistance-based sensor mounted in the base pan, not a mechanical float like Bosch E15 or Samsung LC. This makes it significantly more sensitive to condensation. After a long hot cycle, steam condenses and drips into the base pan, raising sensor resistance and triggering AE even when there is no actual leak.

LG's AE code uses a resistance-based sensor mounted in the base pan, not a mechanical float like Bosch E15 or Samsung LC. This makes it significantly more sensitive to condensation. After a long hot cycle, steam condenses and drips into the base pan, raising sensor resistance and triggering AE even when there is no actual leak. The single most important first step is to unplug the dishwasher for 2 hours and let the base pan dry before doing anything else. In about 45% of reported AE cases, this clears the code permanently. If the code returns, investigate the door gasket (30% of real leak cases) and then the sump seal.

LgDishwasherSeverity: critical85% DIY Success
Time to Fix
20–60 min
Difficulty
beginner
Parts Cost
$15 – $38
Tools Needed
Flashlight, Flathead screwdriver

What Does the AE Code Mean?

LG's base pan uses a resistance sensor, not a float. Condensation after a hot cycle is the leading cause of AE. Unplug for 2 hours before assuming a real leak exists.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Condensation from a hot cycle dripping into the base pan (false trigger)40%
Door gasket leak at the lower front corners24%
Sump seal degradation allowing water under the tub14%
Failed or shorted leak sensor giving a permanent fault reading12%
Cracked sump housing10%

Symptoms You May Notice

  • AE displayed on control panel
  • Dishwasher stops mid-cycle or will not start
  • No visible puddle under the unit in many cases
  • Code appears most often after a hot or sanitize cycle

Can you reset a Lg dishwasher to clear the AE code?

Unplug the dishwasher for at least 2 hours (not just 60 seconds) to allow the base pan sensor to reset. After plugging back in, if the base pan is genuinely dry, the AE code will not reappear on startup. If the code reappears without running a cycle, the sensor has failed or there is still moisture present.

Tools Required for Diagnosis

FlashlightFlathead screwdriverMultimeter

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

1

Unplug the dishwasher from the wall outlet

Unplug the dishwasher from the wall outlet. Do not tilt the unit yet. Leave it unplugged for a minimum of 2 hours at room temperature to allow any condensation in the base pan to evaporate. This step alone resolves AE in about 45% of cases.

2

With the dishwasher unplugged

3

Remove the kick plate at the base of the dishwasher

4

If water trails lead to the sump area

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name
Leak SensorAEB72909507 · $15–$25
Door GasketAHT73236503 · $22–$38

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
REPAIR
Estimated Cost: $27 (Parts) vs $700 (New Machine)

Frequently Asked Questions

Why does LG AE trigger after a hot cycle with no visible leak?
LG's base pan uses a resistance sensor, not a float. Steam from a hot wash condenses inside the door and drips into the base pan. Even a small amount of moisture changes the sensor's resistance reading and triggers AE. The fix is simply unplugging for 2 hours to let it dry -- no parts needed in most cases.
Do I need to tilt the dishwasher to clear AE?
Not always. Unlike Samsung LC where tilting helps drain the float chamber, LG AE uses a resistance sensor that responds to moisture, not water volume. Tilting is unnecessary in most cases. A 2-hour unplug at room temperature is the correct first step.
How do I know if my AE is a real leak versus condensation?
Remove the kick plate and inspect the base pan with a flashlight after the 2-hour unplug. If the pan is completely dry but the code still appears on startup, the sensor has failed. If you see standing water or a water trail, there is a real leak and you need to find the source.

Related Lg Dishwasher Error Codes

Code: OELG Dishwasher OE Error Code: Drain FaultCode: L2LG Dishwasher L2 Error Code: Secondary Leak SensorCode: IELG Dishwasher IE Error Code: Water Inlet Fault

Same Fix on Other Brands

Bosch E15: Samsung LC:

Same Fix Works on These Brands

Lg shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

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Models Known to Experience AE Errors

This repair applies to most Lg dishwashers with this error code. Common model numbers include:

LDFN4542D, LDF5545ST, LDFS5788S, LDP6763ST, LDFN3432T, LDFN4542S, LDFN4542W

Last verified for technical accuracy on March 14, 2026