tCL
LG Dishwasher
Severity: MinorWhat Does This Error Mean?
tCL is not an error — it's a reminder that your LG dishwasher needs a cleaning cycle. The machine is telling you it's time to run the Tub Clean program. This prevents odour, grease, and mineral buildup inside the dishwasher.
Affected Models
- LDF5545ST
- LDFN4542D
- LDT5678SS
- Most LG built-in dishwashers with Tub Clean
Common Causes
- The dishwasher has run a set number of cycles without a tub clean
- The machine has detected buildup in the tub based on usage patterns
- The Tub Clean reminder cycle has been due for a while and hasn't been run
- The tub clean counter was not reset after the last cleaning
- Food residue or grease has accumulated in the sump area
How to Fix It
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Empty the dishwasher completely — remove all dishes and racks.
The Tub Clean cycle works best with nothing inside the machine.
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Add a dishwasher cleaning tablet or tub cleaner to the bottom of the tub.
Alternatively, add 1–2 cups of white vinegar to the bottom of the tub.
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Select the Tub Clean cycle on your dishwasher's control panel.
It is usually a dedicated button or a cycle option in the settings menu.
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Run the full Tub Clean cycle — do not interrupt it.
The cycle typically takes 60–90 minutes. Let it run to completion.
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After the cycle ends, the tCL reminder should clear automatically.
If it doesn't, check your model's manual for instructions on resetting the tub clean counter manually.
When to Call a Professional
tCL is a maintenance reminder — not a fault. No professional is needed. If tCL appears constantly even after running tub clean, the counter may need a manual reset. If you notice persistent odours after tub clean, consider calling a technician for a deep clean. Persistent odour can also mean the drain hose is installed at the wrong height.
Frequently Asked Questions
Do I have to run the Tub Clean cycle immediately when tCL appears?
Not immediately — the dishwasher will still function normally. But you should run it within a few days. Ignoring it for weeks leads to odour, grease buildup, and reduced cleaning performance.
How often does tCL appear on LG dishwashers?
LG typically triggers tCL every 30 cycles. If you run one load per day, expect to see it roughly once a month.
Can I use vinegar instead of a cleaning tablet for Tub Clean?
Yes. Pour 1–2 cups of white vinegar into the bottom of the tub (not the dispenser). Run the Tub Clean cycle as normal. Vinegar is excellent at dissolving mineral scale and deodorising.