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whirlpool | air-conditioner – Refrigerant Shortage Detected
Error Codes (undefined): Troubleshooting, Fixes & Prevention Tips explained below.

What Does CH38 Mean?❓

CH38 means that your LG air conditioner has detected that the refrigerant level is too low to operate normally. This is often due to a leak or improper installation and may trigger the system to shut down as a protective measure.

air-conditioner - Causes of CH38 Error

  • Refrigerant leak in the pipes or joints
  • Factory-charged refrigerant was insufficient
  • Poor vacuuming or gas charging during installation
  • Physical damage to refrigerant lines
  • Aging system with natural refrigerant loss over time

air-conditioner - How to Fix CH38 Error❓

  • Leak Check

    1. Use nitrogen pressure test or electronic detector to find leaks.
    2. Inspect all pipe joints and coils for damage.

  • Seal and Repair

    1. Seal minor leaks using brazing or replace faulty parts.
    2. Ensure joints are tight and secure.

  • Vacuum and Recharge

    1. Vacuum the system to remove air and moisture.
    2. Recharge with correct refrigerant type and amount as per LG specs.

  • System Test

    1. Monitor pressure and cooling after recharging.
    2. Make sure CH38 doesn’t reappear after extended use.

air-conditioner - Helpful Tips

  • Do not ignore refrigerant errors—they can damage your compressor.
  • Never attempt to refill refrigerant yourself without proper certification.
  • Check outdoor unit for physical damage or wear.
  • Always use an LG-authorized technician for refrigerant-related issues.
  • Service the unit regularly to detect leaks early.

Frequently Asked Questions❓

Question: Is CH38 a serious error?
Answer: Yes, because operating with low refrigerant can damage the AC over time.
Question: Can I fix CH38 without a technician?
Answer: No, refrigerant handling requires certified professionals and tools.
Question: How much refrigerant does my LG AC need?
Answer: It depends on the model. Typical split units require between 700g to 1200g of R32 or R410A.

When to Contact a Technician

If you experience any of the following issues even after completing the recommended troubleshooting steps, please contact an authorized service technician or our support team for further assistance.

  • The same error appears repeatedly after restarting or resetting the unit.
  • Multiple error codes appear simultaneously.
  • The device makes unusual noises, vibrations, or emits a burning smell.
  • The product fails to start, operate, or complete its function despite troubleshooting.
  • There are signs of electrical issues, physical damage, or leakage.
  • An unknown or unlisted error code appears on the display.

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