How to Enter Diagnostic Mode on a Samsung Dishwasher

Samsung dishwashers display letter-number codes on the front panel, or blink cycle lights in a pattern on non-display models.

Step-by-Step: Samsung Dishwasher Diagnostics

1
On display models, read the code directly (LC, 5C, etc.).
2
On non-display models, count which cycle indicator lights blink — the combination maps to a code in the user manual's troubleshooting table.
3
For the LC leak code specifically: pull the unit out, remove the kick plate, and check the base pan for moisture — the leak sensor sits in the pan and trips on any water, including detergent overflow.
4
SmartThings-connected models report faults in the app with plain-English descriptions.
5
The tech sheet behind the kick plate lists the service-mode entry sequence for your control revision.

💡 Good to know: The LC code keeps the dishwasher disabled while the base pan is wet. Drying the pan with a towel or letting it sit unplugged for 24 hours clears stubborn cases.

Found a Code? Look It Up

Once diagnostics shows you a stored code, find its meaning and fix guide in the full Samsung dishwasher code list. These are the highest-priority codes on this platform:

Leak sensor activated — water detected at base of dishwasher

⚠ High Severity

Drain failure — water not draining from dishwasher

⚠ High Severity

Wash motor error — circulation pump failure

⚠ High Severity

Heater error — water not heating

⚠ High Severity

Pump/zone wash fault — distribution motor or pump circuit error

⚠ High Severity

High temperature heater error — water overheating detected

⚠ High Severity

Frequently Asked Questions

How do I clear the LC code on a Samsung dishwasher? +

Dry the base pan completely (remove the kick plate and towel it out or let it air-dry 24h unplugged), then restore power. LC will not clear while the leak sensor detects moisture.

How to Reset a Samsung Dishwasher → ← All Samsung Dishwasher Error Codes