Samsung dishwasher troubleshooting involves identifying error codes like LC or 5C to pinpoint faults. The most common fix for a non-starting unit is checking the power supply or door latch.
Samsung dishwashers are actually pretty good at telling you what's wrong, if you know how to listen. Ignore an LC code too long and you risk water sitting in that base pan and rotting the floor underneath the unit. I've seen a $150 sensor fix turn into a $2,000 flooring job because someone kept hitting cancel and hoping it'd go away. Don't do that.
When your Samsung dishwasher acts up, it's usually trying to tell you something through a code. A lot of homeowners panic when they see LC or 5C, but honestly those are pretty often simple fixes involving the drain path or the base pan sensor. I always check the control lock or the sink air gap before pulling the unit out. And nine times out of ten, that's all it takes.
Most Likely Causes
Based on aggregated repair data, here is the probability breakdown for this error code:
LC error from condensation in base pan40%
Drain blockage in filter or pump mesh (SC/5C/SE)24%
No water supply due to closed valve or clogged inlet screens (4C)14%
Door latch not signaling closed12%
Control lock preventing operation10%
Symptoms You May Notice
There's a code flashing on the display, usually LC, 5C, 4C, or OC, and the machine won't start or just stops mid-cycle.
The tub has an inch of standing water at the bottom after the cycle finished, and it smells like it's been sitting there a while.
You can hear the machine humming and running but the dishes come out looking like they never got touched, still have food stuck in the corners of every bowl.
Panel lights are on but nothing responds when you press buttons. Zero reaction.
Machine kicks off normally then stops after about 8-10 minutes, sometimes throwing a code, sometimes just going quiet.
Can you reset a Samsung dishwasher to clear the TROUBLESHOOT code?
To clear a soft error, press and hold the Start/Cancel button for 3 full seconds until the display resets and you hear a beep. If the machine's totally unresponsive, flip the breaker off and wait at least 60 seconds. That gives the capacitors on the control board time to fully discharge, which clears a surprising number of stubborn glitches. After you restore power, don't start a cycle right away. Wait about 30 seconds for the board to run its startup check.
Tools Required for Diagnosis
Phillips #2 screwdriverFlashlightMultimeterSmall brush for filter cleaningTurkey baster or shop towel for base pan water removalToothpick or thin wire for clearing spray arm holesHair dryer (for drying float sensor)
Diagnostic Checklist
Follow these steps in order. We start with the easiest external fixes before opening up the machine.
Replacement Parts
If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.
Part Name
OEM Number
Estimated Price
Drain PumpDD31-00005A · $30–$52
DD31-00005A
$30 – $52
Water Inlet ValveDD62-00136A · $25–$42
DD62-00136A
$25 – $42
Door Latch AssemblyDD81-02028A · $20–$35
DD81-02028A
$20 – $35
Frequently Asked Questions
What is the first thing to check when a Samsung dishwasher has a problem?
Look for a code first. Samsung machines are pretty good at self-diagnosing and if you see LC, 5C, or 4C on that display, you're halfway to the fix already. If the screen is blank, I check the Child Lock status first, then the GFCI outlet under the sink. Those two things alone account for probably a third of the 'my dishwasher won't turn on' calls I get. No tools required, takes 2 minutes.
How do I run Samsung dishwasher diagnostics?
Hold the Sanitize and Hi-Temp Wash buttons together for about 5 seconds. The machine will enter service mode and start cycling through its components automatically. Listen closely. You want to hear a clean hum from the drain pump and circulation motor. If you hear grinding or the pump sounds like it's straining, that's your answer right there without having to pull apart the whole machine. Some older models use a different button combo so pull up your model number first just to confirm.
What maintenance prevents most Samsung dishwasher problems?
Clean the fine mesh filter every 2-3 weeks, seriously. Samsung pumps have way less tolerance for debris than older American-made machines. A tiny piece of broken glass will score up the impeller housing in a few cycles. Also go easy on the Sanitize setting. I know it feels like cleaner dishes but that extreme heat creates a ton of condensation that drips into the base pan and eventually trips the LC sensor. Run it maybe once a week max, not every cycle.
Can I fix a Samsung dishwasher LC code myself?
Yeah, most of the time. If it's just condensation in the base pan, you pull the unit forward, tilt it slightly, mop out the water, dry the float sensor, and you're done. Maybe 30 minutes total. If the water in the base pan keeps coming back, then you've got an actual leak from the door seal, the inlet valve, or the pump housing, and that's worth figuring out before you put everything back. The float sensor itself is only about $15-20 if it turns out the sensor got waterlogged and stopped working right.
How long do Samsung dishwashers usually last and is this repair worth it?
Realistically you're looking at 8-12 years on these machines with decent maintenance. If yours is under 7 years old, almost any repair short of a main control board replacement is worth doing. The board itself runs $120-200 for the part and honestly that's where I start doing the math on whether it makes sense. But if you're dealing with a clogged filter, a bad door latch, a drain pump, or a leak sensor, those are all $20-80 parts and none of them are hard to swap out yourself.
Why does my Samsung dishwasher stop mid-cycle?
Usually it's one of three things. Either the door latch is losing contact and the machine thinks you opened the door, there's a drain issue building up and the machine's stopping as a protection measure, or the control board is getting a voltage hiccup. The first thing I do is run it while I'm home and listen for the exact moment it stops. Does it stop at the same point every cycle? That narrows it down fast. Mid-cycle shutoffs that happen randomly are usually power or board related. Shutoffs that happen at the same point are almost always a specific component failing that test in the cycle.