LG · Dryer

AE

Communication Error

Severity

High

Seeing AE on your LG Dryer display means the appliance self-diagnostic detected "Communication Error". Before calling a technician, work through the steps in this guide — the fix is often simpler than you think.

Owner's Summary

The two computer boards inside your LG dryer have lost communication with each other. A 10-minute power cycle resolves this in many cases. If AE returns every time, a board replacement will likely be needed.

Symptoms

LG dryer unresponsive, lights flashing, AE error code

Common Causes

Loose wiring harness between control boards
Power surge damaging communication circuit
Failed main control board
Failed display board

How to Fix

1 Unplug dryer for 10 minutes and reconnect power
2 Inspect and reseat wiring harness connectors between boards
3 Check for burn marks on PCB
4 Replace main PCB if error persists
5 Replace display board if main PCB tests good

Tools You'll Need

Electrical Contact Cleaner Flashlight

Most of these fixes need only basic hand tools. If your repair requires opening electrical housings or testing live components, a multimeter and basic electrical safety knowledge are essential — when in doubt, call a technician.

Technical Explanation

LG dryers use serial communication between the main PCB and the display/control board. AE is generated when the main board does not receive valid acknowledgment packets within the communication timeout window.

Is It Safe to Keep Using?

Safe to leave off. Do not attempt cycles with AE active.

Technician's Pro Tip

Vibration from drum rotation over years of use can cause harness connectors to back out gradually. Inspect the full harness length for looseness and chafing before replacing any boards.

Related Codes

OE — LG Washing Machine

Drain Error — Outlet Error

High

IE — LG Washing Machine

Inlet Error — Water Not Filling

High

LE — LG Washing Machine

Motor Error — Locked Motor

High

Frequently Asked Questions

What does error code AE mean on a LG Dryer?

Code AE on a LG Dryer indicates "Communication Error." In practice, the most common trigger is loose wiring harness between control boards. Severity is rated high, and typical repair costs range from $0 to $300.

Can I fix AE myself, or do I need a technician?

Many cases of AE can be resolved without a technician. The first step to try: unplug dryer for 10 minutes and reconnect power. If that doesn't clear the code, work through the remaining steps in the "How to Fix" section above before assuming a part needs replacing.

Is it safe to keep using my dryer with code AE showing?

Safe to leave off. Do not attempt cycles with AE active.

How much does it cost to repair AE on a LG Dryer?

Repair costs for code AE typically range from $0 to $300. Connector reseat: $0; Main PCB: $80–$300; Display board: $40–$120. Costs on the low end usually reflect a DIY fix with no parts required, while the high end reflects a part replacement plus professional labor.

Estimated Repair Cost USD

$0 – $300

Connector reseat: $0; Main PCB: $80–$300; Display board: $40–$120