What to Check First
- If the LED lamp blinks or an error code [CH 00] appears on the display, your unit requires inspection. The error may be a temporary one caused by power instability or other electrical factors.
- ➔ Unplug the power cord or turn off the circuit breaker, wait for 5 minutes, then restore power. If the same error code or symptoms persist, a thorough inspection by a technician is necessary.
- - Below is a detailed troubleshooting guide for each error code. The letters CH precede the error codes listed below. Select the error code being displayed on your AC.
- * If you encounter any error codes not listed below, it is recommended to request a service technician for a detailed inspection, as self-resolution may be difficult.
- CH 04 indicates a drainage issue, possibly a malfunction of the indoor unit drain, or that the condensate tank is too full.
- [Ceiling type air conditioner].
- The error code CH04 indicates that water (condensate) formed inside the indoor unit is not being drained. Unplug the power cord or turn off the circuit breaker, wait for 5 minutes, then restore power. If the same issue persists after performing a reset, please request service.
- [Window type, Portable type].
- These types of air conditioners are designed so that condensate (water) formed during operation naturally evaporates. However, on rainy days or when humidity is high, condensate amount may increase, causing an CH04/FL error. For these types of air conditioners, condensate to resolve the error. Cooling mode will still operate as normal, so please rest assured. However, if the CH04/FL error occurs frequently, even on dry days, product inspection is necessary.
- ※ Depending on your product model and software update, the error code CH04 may appear as FL.
Why This Can Happen
Symptoms can have more than one cause, and the correct steps depend on the exact model, installation and operating conditions. Use the checks above to narrow the issue before service.
Safety and Model-Specific Guidance
Frequently Asked Questions
What should I check first for [LG Air Conditioner] Guide to Error Codes?
If the LED lamp blinks or an error code [CH 00] appears on the display, your unit requires inspection. The error may be a temporary one caused by power instability or other electrical factors.
When should I stop troubleshooting and contact LG?
Stop if the product shows signs of electrical damage, burning, leaking near electrical components, or if the recommended checks do not resolve the issue. Use LG USA support for model-specific service guidance.
Does this guidance apply to every LG model?
Not always. Controls, error codes and service steps can differ by model. Confirm the exact model number and follow the linked LG USA article for model-specific instructions.
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