LG Dishwasher Error Code LC

The LC code means the dishwasher's leak detection sensor has registered a voltage of 1 volt or less for at least 3 seconds, indicating water has been detected in the base pan beneath the tub. When this happens, the main relay shuts off to stop the machine from operating. The dishwasher will not resume until the source of the leak is identified and cleared. This code applies to units running firmware version 7134 and later.

No, you should not attempt to bypass or ignore the LC error. The dishwasher has automatically shut off its main relay as a protective measure because water was detected where it should not be. Running the machine with an unresolved leak risks further water damage to your flooring, cabinetry, and the dishwasher itself. Address the leak source before restarting.

Repair costs vary depending on the cause. If the issue is a worn door gasket, parts typically range from $15 to $50, with professional labor adding $75 to $150 or more depending on your area. A faulty water inlet valve can cost $20 to $80 for the part. If the leak sensor itself needs replacement or the base pan just needs to be dried and cleaned, the cost may be minimal. Getting a professional diagnostic visit is recommended if you cannot locate the source of the leak yourself.

Start by checking the shutter and door gasket area for any visible water traces. Pull the dishwasher out carefully and inspect the base pan for standing water, then look for the source by examining hose connections, the door seal, and the inlet valve. Once the leak source is repaired and the base pan is fully dried out, the error should clear. If no active leak is found, the sensor contacts may have residual moisture or soap film causing a false trigger.

A power reset may temporarily clear the code, but if water remains in the base pan or the underlying leak has not been fixed, the LC error will return as soon as the sensor detects the low-voltage condition again. The base pan must be dried out and the cause of the water intrusion must be resolved for the fix to be permanent.