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LG Refrigerator tt Error Code
Water tank not detected on LG refrigerators.
On models with an internal water tank, tt means the tank is missing, not seated properly, or its detection sensor has a fault.
Compatible models
You'll only see tt on LG refrigerators that have a removable internal water tank.
Also shown as
No other codes are listed for this fault.
Difficulty
Most people can clear this one at home with simple checks.
Not sure you are reading the code right? See how to read LG refrigerator codes.
How to fix LG tt
Reseat the water tank
Take the tank out, make sure nothing is caught behind it, and push it back firmly until it sits fully in place.
Reset if needed
If the code stays, unplug the fridge for about 5 minutes and plug it back in.
When to call a technician
If the tank is seated correctly and the code continues, book service for the tank sensor.
Parts linked to tt
These are the parts most often behind this code. Tap one to see what it does and the signs it is failing.
Order parts by your full model number so they fit.
Frequently asked questions
Which LG models show the tt code?
You'll only see tt on LG refrigerators that have a removable internal water tank.
Can I fix LG tt myself?
Usually, yes. Most tt problems clear with simple checks you can do at home. Start with the first step above: reseat the water tank.
Other LG refrigerator codes
- OFFFridge is in demo (display) mode
- Er FFFreezer fan is blocked or not running
- Er rFRefrigerator fan is not running properly
- Er dHDefrost cycle failed
- Er IFIce maker fan problem
- Er ISIce maker sensor fault
- Er ItIce maker motor or assembly fault
- Er gFWater flow sensor error
- Er COMain board and display are not communicating
- Er CFCondenser fan error
- Er FSTemperature sensor fault
- Er CHSealed system (refrigerant) fault
- Er 22Compressor relay problem
- FUCooling cycle error
- Er 67Door not closing fully
- SbSabbath mode is on
Last reviewed 2026-10-19. Codes and steps can vary by model; check your owner's manual.