LG Dryer Error Code E13 — Communication Error
What this means
The E13 error code indicates a communication failure between the dryer's display (user interface) board and the main control board. These two boards exchange data through a wiring harness. When communication is lost, the dryer cannot receive cycle selections or report status. Common causes are a loose harness connection, a failed display board, or a faulty main board.
Step-by-step fix
4 stepsPower cycle the dryer
Unplug the dryer for 15 minutes and plug it back in. Communication errors can sometimes be caused by a temporary glitch that a reset will clear.
Check the wiring harness between boards
Unplug the dryer. Remove the top panel to access the main control board, and open the control panel housing to access the display board. Check the ribbon cable or wiring harness connecting the two boards. Ensure both ends are firmly seated.
Look for any pinched or damaged wires where the harness passes through the dryer frame.
Inspect both boards for damage
Visually inspect both the display board and main control board for burned components, corrosion, or water damage. Any visible damage indicates the affected board needs replacement.
Replace the faulty board
If the harness is intact, one of the boards is likely failed. The display board is typically less expensive and more commonly the culprit. Replace it first. If E13 persists, the main control board may also need replacement.
When to call a professional
Diagnosing which board has failed can be difficult without specialized tools. A technician can test signal output from each board to pinpoint the fault, potentially saving you from replacing the wrong component.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Display Control Board (User Interface)
Part #EBR76542935 · $50–$120
If display board has visible damage or fails first
Main Control Board Assembly
Part #EBR76542946 · $100–$250
If main board is the source of communication failure
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