LG S12ET - User Manual

Questions and Answers

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Evan AllenAug 15, 2025
Why is my LG S12ET not emitting cool air?
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  Randall TurnerAug 15, 2025
  Several factors can cause your LG Air Conditioner to not emit cool air. Ensure that curtains, blinds, or furniture aren't blocking the unit. Clean the air filter every 2 weeks. If the room temperature is too high, select Jet Mode for faster cooling. Ensure no cold air escapes through ventilation points. Set the desired temperature lower than the current temperature. Avoid using heat generators nearby and make sure Fan Mode is not selected. If the outside temperature is too high, the cooling effect may be insufficient.
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Darrell ChangAug 18, 2025
What to do if my LG S12ET does not work?
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  Timothy LewisAug 18, 2025
  If your LG Air Conditioner isn't working, first check if it's plugged in and the power isolators are on. Replace the fuse or check the circuit breaker if it has tripped. If there was a power failure, wait 3 minutes after power is restored before turning the unit back on. Also, verify that the batteries in the remote controller are correctly inserted or replace them. Lastly, ensure the unit wasn't turned off automatically by a preset timer; if so, turn it back on.
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adamsshaneAug 21, 2025
Why won't my LG S12ET connect to Wi-Fi?
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  Martin StevensAug 22, 2025
  If your LG appliance and smartphone won't connect to Wi-Fi, ensure you're using the correct Wi-Fi password. Remove the Wi-Fi network from your smartphone and register your appliance on LG ThinQ again. Turn off mobile data on your smartphone and use Wi-Fi to register the appliance. The wireless network name (SSID) should only contain English letters and numbers, without special characters. Ensure your router frequency is set to 2.4 GHz, as this is the only supported frequency. Finally, reduce the distance between the appliance and the router to improve signal strength.
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Seth LyonsAug 25, 2025
What to do if my LG S12ET does not work normally?
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  patricia08Aug 25, 2025
  If your LG Air Conditioner isn't working normally, and you notice burning smells, strange sounds, water leaks even at low humidity, a damaged or overheating power cable, issues with the circuit breaker, or error codes, immediately turn off the air conditioner, disconnect the power supply, and contact a service center.
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Wyatt RamirezAug 28, 2025
Why does my LG Air Conditioner stop during operation?
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  keith93Aug 28, 2025
  Your LG Air Conditioner might stop during operation because the Timer Function has timed out, which turns the unit off automatically. Check the timer settings. Also, if a power failure occurred during operation, wait for the power to come back. If you have the Auto Restart function enabled, your unit will resume its last operation several minutes after power is restored.
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bpattersonAug 31, 2025
Why is my LG S12ET still operating after I turned it off?
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  Dustin RobertsonSep 1, 2025
  The indoor unit might still be operating because the Auto Clean function is active. This function removes remaining moisture inside the unit. If you prefer to disable this feature, you can manually turn the unit off.
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landrewsSep 3, 2025
Why can't I adjust the fan speed on my LG S12ET Air Conditioner?
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  smartinezSep 4, 2025
  If you can't adjust the fan speed on your LG Air Conditioner, it might be because you've selected Jet Mode or Auto Operation Mode. In these modes, fan speed adjustment is often disabled. Try selecting a different operation mode that allows you to manually adjust the fan speed.
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Julie MoranSep 7, 2025
Why does my LG S12ET smell?
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  James TaylorSep 7, 2025
  Odors, such as cigarette smoke, can be absorbed into the indoor unit and discharged with the airflow. If the smell persists, wash the filter. If the smell still doesn't disappear after washing the filter, contact the service center to clean your heat exchanger.
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Carlos AndersonSep 10, 2025
Why can't I adjust the temperature on my LG Air Conditioner?
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  whitneyjoannaSep 12, 2025
  If you can't adjust the temperature on your LG Air Conditioner, it is possible that the Fan Mode or Jet Mode is selected. In some operation modes, you cannot adjust the temperature, so select an operation mode in which you can adjust the temperature.

Summary

SAFETY INSTRUCTIONS

General Safety Symbols and Warnings

Explains safety symbols like WARNING, CAUTION, and refrigerant warnings.

Important Safety Instructions

Crucial guidelines for safe operation, installation, and child supervision.

Maintenance and Technical Safety

Safety measures for maintenance, installation, and repair by qualified personnel.

OPERATION

Operation Basics and Parts

Notes for operation, energy saving, and identification of unit parts.

Remote Control Operations

Inserting batteries, remote control usage, and holder installation.

Unit Modes and Functions

Guide to selecting modes (Cooling, Heating, etc.) and using functions like Jet Mode, Timers, and Sleep.

Advanced Features

Using Energy Display, Light Off, Comfort Air, Energy Control, and Air Purification.

SMART FUNCTIONS

LG ThinQ Application Setup

Guide to installing and connecting the LG ThinQ app to the appliance.

Smart Diagnosis and Troubleshooting

Using ThinQ app or audible diagnosis to identify and solve appliance problems.

MAINTENANCE

General Maintenance Guidelines

Warning before maintenance, and recommendations for long-term storage.

Cleaning Air and Allergy Filters

Step-by-step instructions for cleaning the air and optional allergy filters.

TROUBLESHOOTING

Self-Diagnosis and Pre-Service Checks

Using self-diagnosis and performing checks before contacting service for issues.

Common Problem Resolution

Diagnosing and resolving issues like no cool air, unit stopping, mist, noise, and odors.

Wi-Fi Connection Troubleshooting

Resolving problems with connecting the appliance and smartphone to Wi-Fi.

LG S12ET Specifications

General

Type	Split System
Energy Efficiency Ratio (EER)	3.21
Refrigerant	R410A
Compressor Type	Rotary
Energy Efficiency Class	A++
Power Supply	220-240V, 50Hz
Operating Temperature (Cooling)	18°C
Cooling Capacity	12000 BTU/h