Skip to content
EN

LG · LG wall-mounted Inverter air conditioners (RAC) – CH codes · Procedure

LG air conditioner shows a CH code – how to do a power reset and when to call service

Summary (editorial)

The error may be temporary, caused by power instability. The manual describes a power reset; if the same code persists, a technician must inspect the unit.

✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.

From the manufacturer's documentation (English source wording, with page)

  1. If the LED lamp blinks or an error code appears on the display, your unit requires inspection[1]
  2. The error may be a temporary one caused by power instability or other electrical factors[2]
  3. Perform a power cycle (reset): unplug the power cord or turn off the circuit breaker, wait for 5 minutes, then restore power[3]
  4. If the same error code or symptoms persist, a thorough inspection by a technician is necessary[4]
  5. CH10/E6 and CH67/EF: check for any debris or snow buildup around the indoor and outdoor fan components, and remove it[5]
  6. The CH61 error will not automatically clear. To clear the error, perform a power cycle[6]
  7. CH38/F4: likely refrigerant shortage – contact the installation technician[7]

⚠ Work on refrigerant circuits, mains electricity and PV DC wiring is for qualified technicians only.

The Polish page has more detail (plain-language explanation, safe checks, guides): Read in Polish →

Sources

Every statement has a footnote to the document and PDF page. “Quote verified” means the quote was found automatically in the text of that page.

  1. [1] LG USA Support – [LG Air Conditioner] Guide to Error Codes (help library, 2026-02-23) – text capture , p. 2 official manufacturer document quote verified if the led lamp blinks or an error code
  2. [2] LG USA Support – [LG Air Conditioner] Guide to Error Codes (help library, 2026-02-23) – text capture , p. 2 official manufacturer document quote verified the error may be a temporary one caused by power instability
  3. [3] LG USA Support – [LG Air Conditioner] Guide to Error Codes (help library, 2026-02-23) – text capture , p. 2 official manufacturer document quote verified unplug the power cord or turn off the circuit breaker, wait for 5 minutes, then restore power.
  4. [4] LG USA Support – [LG Air Conditioner] Guide to Error Codes (help library, 2026-02-23) – text capture , p. 2 official manufacturer document quote verified if the same error code or symptoms persist, a thorough inspection by a technician is necessary.
  5. [5] LG USA Support – [LG Air Conditioner] Guide to Error Codes (help library, 2026-02-23) – text capture , p. 2 official manufacturer document quote verified check for any debris or snow buildup around the indoor and outdoor fan components
  6. [6] LG USA Support – [LG Air Conditioner] Guide to Error Codes (help library, 2026-02-23) – text capture , p. 2 official manufacturer document quote verified the ch61 error will not automatically clear.
  7. [7] LG USA Support – [LG Air Conditioner] Guide to Error Codes (help library, 2026-02-23) – text capture , p. 2 official manufacturer document quote verified please contact the installation technician to inspect the unit.