LG S4UQ12JA3A3 - User Manual

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OWNER’S MANUAL

Copyright © 2017 - 2020 LG Electronics Inc. All Rights Reserved

TYPE: WALL MOUNTED

MFL69781401

Rev.07_071720

EN ENGLISH

Read this owner's manual thoroughly before operating the

appliance and keep it handy for reference at all times.

AIR CONDITIONER

Table of Contents

Questions and Answers

D
Dillon WrightAug 8, 2025
How to fix LG Air Conditioner that does not emit cool air?
- D
  douglasturnerAug 8, 2025
  If your LG Air Conditioner isn't emitting cool air, ensure that curtains, blinds, or furniture aren't blocking it. Clean the air filter every 2 weeks. During summer, select Jet Mode for faster cooling. Ensure no cold air escapes through ventilation points. Set the desired temperature lower than the current room temperature. Avoid using heat generators nearby, and switch from Fan Mode to cooling operation. Keep in mind that the cooling effect might be insufficient if the outside temperature is too high.
S
schroedersarahAug 12, 2025
What to do if my LG S4UQ12JA3A3 does not work normally?
- A
  Antonio FullerAug 12, 2025
  If your LG Air Conditioner stops working normally and you notice a burning smell, strange sounds, water leaks (even at low humidity), a damaged or excessively hot power cable, or if the unit displays an error code, immediately turn off the air conditioner, disconnect the power supply, and contact the service center.
B
Bryan HarmonAug 16, 2025
Why does my LG S4UQ12JA3A3 Air Conditioner stop during operation?
- D
  Daniel BrownAug 17, 2025
  If your LG Air Conditioner stops during operation, the Timer Function may have timed out. Check the timer settings. 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.
R
Rebecca ThomasAug 20, 2025
Why LG S4UQ12JA3A3 does not emit warm air?
- G
  garciajonAug 20, 2025
  If your LG Air Conditioner does not emit warm air, and the vane is almost closed when Heating Mode starts, this is normal; wait for the unit to generate enough warm air. Also, the outdoor unit may be in Defrosting Mode, which removes frost and should finish in about 15 minutes. Note that the heating effect may not be sufficient if the outside temperature is too low.
H
Haley DuncanAug 26, 2025
Why is my LG S4UQ12JA3A3 still operating when the unit has been turned off?
- J
  jeffreyleeAug 26, 2025
  If your LG Air Conditioner's indoor unit is still operating after you've turned it off, the Auto Clean function is likely running to remove moisture. Allow it to continue, or turn the unit off to disable the feature.
S
Stephanie LivingstonAug 29, 2025
Why can't I adjust the temperature on my LG S4UQ12JA3A3?
- L
  lawrencegrantAug 29, 2025
  If you can't adjust the temperature on your LG Air Conditioner, it's likely because you're in Fan Mode or Jet Mode. Switch to a mode where temperature adjustment is possible.
A
Anne BryantSep 2, 2025
Why does my LG S4UQ12JA3A3 smell?
- H
  harringtonterrenceSep 2, 2025
  If your LG Air Conditioner's indoor unit gives off an odor, it may be due to absorbed odors like cigarette smoke being discharged with airflow. Try washing the filter. If the smell persists, contact the service center to clean the heat exchanger.

LG S4UQ12JA3A3 Specifications

General

Brand	LG
Model	S4UQ12JA3A3
Category	Air Conditioner
Language	English

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