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lg | air-conditioner Error Codes: Troubleshooting, Fixes & Prevention Tips explained below.

What Does the Lo Code Mean?

Lo is a status message that tells you the AC is running in a special operation mode. If it’s in Low Noise Mode, it reduces fan and compressor noise for quieter performance. If it’s in Test Mode, it might have been activated during installation or diagnostics. Lo is not a malfunction.

air-conditioner - What Triggers the Lo Code?

  • User enabled Low Noise Mode via remote or app
  • Technician enabled Test Mode for diagnostics
  • System automatically activated silent mode at night
  • Outdoor unit operating at low capacity due to low demand
  • Temporary override during installation or maintenance

air-conditioner - How to Exit Lo Mode

  • Disable Low Noise Mode

    1. Use your remote control and press the function or settings button.
    2. Look for an option called 'Low Noise' or 'Silent Mode' and turn it off.
  • Restart the AC

    1. Turn off the air conditioner completely.
    2. Wait a few minutes and then turn it back on to exit test or silent mode.
  • Reset via App

    1. If using the LG ThinQ app, navigate to operating modes and ensure normal mode is selected.

air-conditioner - Helpful Tips

  • Lo is not an error code—it indicates a mode of operation.
  • Using Low Noise Mode at night can improve comfort without sacrificing too much cooling.
  • Do not confuse Lo with cooling errors; check user manual for details.
  • If Lo persists without your input, consult a technician to check for Test Mode.

Frequently Asked Questions

Question: Is Lo an error code?
Answer: No, it’s a mode indicator for Low Noise or Test Mode.
Question: Will my AC cool properly in Lo mode?
Answer: Yes, but cooling may be slower to maintain quiet operation.
Question: How do I know if it’s Test Mode or Low Noise Mode?
Answer: If the unit is newly installed or being serviced, it could be Test Mode. Otherwise, it’s likely Low Noise Mode.

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