LG Dishwasher Error Code OC

The OC code on an LG dishwasher signals an overflow error, meaning the appliance has detected a water level that exceeds safe limits in the drain or tub system. The dishwasher stops the cycle automatically to prevent water damage. Common triggers include a clogged drain filter, an incorrectly installed drain hose, a failing drain pump, or a defective inlet valve. Checking the information code displayed alongside OC is the recommended first diagnostic step to narrow down the exact cause.

No, you should not run the dishwasher while the OC error is active. This code indicates an overflow condition, and operating the appliance could result in water leaking onto the floor or into the cabinet beneath the unit, potentially causing water damage or creating a slip hazard. Resolve the underlying cause before resuming normal use.

Repair costs vary depending on the cause. Clearing a clogged filter or adjusting a drain hose costs nothing beyond your time. Replacing a drain pump typically runs in the range of $80 to $200 in parts, while a new inlet valve or float switch usually falls between $20 and $80 in parts. Adding professional labor generally brings total repair costs to the $150 to $350 range depending on the specific component and your location.

Many causes of the OC error are DIY-friendly, particularly cleaning the drain filter, checking for drain hose kinks, and verifying the hose is correctly routed and connected to the sink drain or air gap. If those steps do not resolve the issue, testing or replacing components like the float switch, inlet valve, or drain pump typically requires basic electrical testing tools and some comfort working with appliance wiring. If you are not confident with those tasks, a qualified appliance technician should handle the repair.

A reset may temporarily clear the OC error code from the display, but it will not fix the underlying problem. If the root cause, such as a blocked drain, faulty pump, or leaking inlet valve, has not been addressed, the error will return during the next wash cycle. Always diagnose and correct the fault before relying on a reset.