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LG Dryer Error Code AE (Communication Error)

AE means the main control board and display board have stopped talking to each other, usually a connector issue rather than a dead board.

Risk: Moderate

Meaning

AE means the dryer’s main control board and the front display board have lost communication with each other. A loose or corroded wiring connector between the two boards is the most common cause, not a failed board.

The information provided here is a diagnostic aid and does not replace the intervention of a qualified professional.

Possible causes

No cause is certain until it has been checked on the appliance.

Likely Loose or partially unseated wiring harness connector
Possible Corroded or damaged connector pins
Possible Main control board failure
Rare Display or interface board failure

Tools needed

Screwdriver
Flashlight
Phone camera
Dry contact cleaner

First checks

Unplug the dryer for 60 seconds to force a full reset, then power it back on.
If the code returns immediately, unplug and check the wiring harness connectors behind the control panel are fully seated.
Inspect connector pins for corrosion or bent pins.
Note whether AE appears constantly or only intermittently, intermittent points more to a loose connector.

Step-by-step diagnosis

Unplug for 60 seconds, restore power, and note whether AE returns at once or only after several minutes.
If it returns, unplug again and remove the control panel. Photograph every connector before you touch one.
Unplug each harness connector between the interface board and the main board, then reseat it firmly until it clicks home.
Look inside the connector housings with a flashlight. Green film on a pin, or a pin pushed back into the housing, explains an intermittent AE far better than a dead board does.
Follow the harness where it crosses the cabinet edge. That is where insulation chafes through.
Reassemble and run a cycle. An AE that now shows up only occasionally still means a marginal connection, not a fixed one.

What not to do

Ordering a replacement control board before checking the harness connectors, that's the cheaper and more common fix.
Repeated power cycling without inspecting the wiring if the code keeps returning.

When to stop

Connectors are clean, seated, and AE returns immediately every time. One of the two boards has failed and they are not interchangeable.
There is visible scorching or a swollen component on either board.

An error code varies by brand

The same code can have a different meaning depending on the brand and model. Always check your appliance's manual before acting.

Related guides

When to call a professional

If the simple checks turned up nothing, if the repair involves electricity, gas, or the sealed refrigerant system, or if you have any doubt at all: stop there and hand the appliance over to a qualified technician.