LG Dryer Error Code U-

The U- code on an LG dryer indicates a Main PGM error, meaning the main control board has encountered a programming fault or has entered a programming mode it cannot exit on its own. This prevents the dryer from operating normally. The issue is centered on the main control board rather than components like heating elements or sensors.

A power reset can sometimes clear the U- code if the board entered programming mode due to a temporary power event or glitch. Unplug the unit, wait several minutes, and plug it back in to attempt a reset. If the U- code reappears after the reset, the underlying programming fault or board damage is likely more serious and will need further diagnosis.

If the issue requires main control board replacement, parts alone typically range from around $100 to $300 or more depending on the specific dryer model, with professional labor adding another $80 to $150 in most markets. If the error clears with a simple reset, there is no parts cost involved. Getting a diagnostic estimate from a certified technician before authorizing repairs is always recommended.

In some cases, a hard reset can clear the U- error. Start by unplugging the dryer from the power outlet, waiting at least 10 minutes to allow the control board to fully discharge, then restoring power. If the code returns immediately, the control board may require professional diagnosis or replacement, which is generally not a straightforward DIY repair.

No, you should not attempt to use the dryer while the U- error is active. The code indicates the main control board is not operating in its normal state, which means cycle control, temperature regulation, and other critical functions may not behave as expected. Running the dryer under these conditions could pose a safety risk or cause further damage to the unit.