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Error code reference

Samsung Dishwasher Error Code LC

Water leakage detected

Samsung codesSamsung dishwasher codes

Water leakage detected - water leakage sensor data equal to or less than 3V for 3 seconds; all driving parts except drain turned off and draining performed for 3 minutes.

First step from the service manual

Check whether there is any trace of water leakage in the shutter.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What LC means on a Samsung dishwasher

The LC error code on a Samsung dishwasher indicates that the leak sensor located in the base pan of the unit has detected moisture. Specifically, the control board triggers this code when the leak sensor signal voltage drops to 3 volts or below and holds at that level for at least 3 seconds. When this threshold is met, the dishwasher responds by shutting off all active driving components except for the drain pump, which then runs for up to 3 minutes in an attempt to remove any accumulated water from the base.

The leak detection system works through a sensor positioned in the bottom pan beneath the wash tub. If water escapes from any internal component and pools in this pan, it contacts the sensor and causes the voltage reading to drop, triggering the protective shutdown. The shutter area is the recommended first inspection point because water can accumulate there due to seal failure, improper installation, or physical damage to the door assembly and surrounding components.

Common sources of the leak include deteriorated door gaskets, loose or cracked water supply and drain hose connections, a faulty water inlet valve, a damaged sump assembly, or a cracked tub. In some cases, using excessive detergent can generate enough foam to overflow and pool in the base pan, triggering a false positive. Identifying the actual leak source requires a careful visual inspection of the base pan, all hose connections, the door seal, and the sump area after the unit is moved out from under the counter.

Source: manufacturer service documentation.

Common causes of LC

  1. 01

    Damaged or worn door gasket

    Part replacement

    The rubber seal around the dishwasher door can crack or warp over time, allowing water to escape during the wash cycle and drip into the base pan. Inspect the full perimeter of the door seal for tears, gaps, or stiff sections that no longer form a tight contact.

  2. 02

    Loose or damaged hose connections

    Wiring / connection

    The water supply line and drain hose connections at the sump, pump, or inlet valve can loosen or develop cracks, causing slow drips that pool in the base. Pull the dishwasher out and inspect all hose clamps and fittings for moisture or corrosion.

  3. 03

    Faulty water inlet valve

    Part replacement

    A water inlet valve that fails to close completely can drip water continuously into the tub even when the dishwasher is off, eventually overflowing into the base pan. Look for water pooling when the unit is idle as a key indicator.

  4. 04

    Excessive detergent or wrong detergent type

    Wiring / connection

    Using too much detergent or a non-dishwasher-rated soap produces heavy foam that can overflow the tub and reach the base sensor, triggering the LC code without a true mechanical leak. Check that you are using the correct dishwasher detergent in the proper amount.

  5. 05

    Cracked sump assembly or tub

    Part replacement

    Physical stress, hard water buildup, or age can cause hairline cracks in the sump assembly or wash tub, producing a slow but continuous leak into the base pan. A thorough inspection of the sump area and tub interior during a dry unit check can help identify this issue.

See the test procedure for each cause

Frequently asked questions about LC

What does LC mean on a Samsung dishwasher?
The LC code means the dishwasher's leak sensor has detected water in the base pan beneath the wash tub. The sensor triggers this code when its voltage reading drops to 3 volts or below for at least 3 seconds. When this happens, the dishwasher shuts off all functions except the drain pump, which runs for about 3 minutes to clear standing water. You should inspect the unit for any visible signs of a water leak before resuming normal operation.
Can I fix the LC error myself, or do I need a technician?
Some causes of the LC code are DIY-friendly, such as tightening a loose hose clamp, replacing a door gasket, or correcting detergent usage. However, if the leak originates from the sump assembly, inlet valve, or a cracked tub, those repairs are more involved and may require a technician. Start by visually inspecting the shutter area, door seal, and all accessible hose connections before deciding whether to call for service.
Is it safe to keep using my dishwasher when the LC code is showing?
No, you should not continue running the dishwasher while the LC code is active. The code indicates water is leaking into the base of the unit, which can damage flooring, cabinetry, and electrical components. The dishwasher intentionally disables itself as a protective measure, and running it again before identifying and fixing the leak source could cause further damage.
Will resetting the dishwasher clear the LC error code?
Resetting the dishwasher may temporarily clear the LC code, but the code will return if the underlying leak source has not been repaired. The base pan also needs to be completely dry before the sensor stops detecting a fault. If water remains in the pan, the code will reappear immediately even after a reset.
How much does it cost to repair a Samsung dishwasher showing the LC code?
Repair costs vary widely depending on the cause of the leak. A door gasket replacement is typically in the range of $20 to $80 for parts if done yourself, while a water inlet valve can run $40 to $120 in parts. If a technician is needed, labor costs generally add $100 to $200 or more to the total. Sump assembly or tub repairs tend to be on the higher end and may prompt a cost comparison with dishwasher replacement.

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