midea | air-conditioner Error Codes: 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
- Use nitrogen pressure test or electronic detector to find leaks.
- Inspect all pipe joints and coils for damage.
Seal and Repair
- Seal minor leaks using brazing or replace faulty parts.
- Ensure joints are tight and secure.
Vacuum and Recharge
- Vacuum the system to remove air and moisture.
- Recharge with correct refrigerant type and amount as per LG specs.
System Test
- Monitor pressure and cooling after recharging.
- 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.
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