LG Dryer Error Code F1 — Main Control Board Failure
What this means
The F1 error code indicates an internal failure of the dryer's main control board (PCB). This is a critical error that typically means the control board has a blown component, corrupted firmware, or a failed relay. The dryer will not operate until the board is replaced.
Step-by-step fix
3 stepsPower cycle the dryer
Unplug the dryer for 15 minutes to allow the control board to fully discharge. Plug it back in and attempt to start a cycle. In rare cases, a power surge can cause a temporary F1 error that clears with a reset.
Use a surge protector for your dryer to protect the control board from power fluctuations.
Check control board connections
Unplug the dryer and remove the top panel to access the control board housing. Open the housing and check that all wire harness connectors are firmly seated. Look for any burned wires, scorched components, or signs of water damage on the board.
Take a clear photo of the board and all connections before touching anything.
Replace the main control board
If the F1 error persists after a reset and connections are secure, the control board needs replacement. Note the exact part number printed on the board. Disconnect all harnesses (labeling each one), remove the mounting screws, swap in the new board, and reconnect everything.
Ensure you order the exact board number for your model. Some boards look similar but have different firmware.
When to call a professional
Control board replacement is generally straightforward but is a costly part. A technician can verify the board is indeed faulty before you invest in the replacement. This is especially worthwhile if the dryer is several years old.
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
Main Control Board Assembly
Part #EBR76542946 · $100–$250
Required if F1 error persists after power cycling
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