LG Mini-Split Code CH06
Soft lockoutShown as: Indoor unit LED1 (units place) blinks 6 times
Indoor unit outlet pipe sensor error. The thermistor on the indoor coil's outlet (gas side) refrigerant pipe is disconnected, shorted or open.
Manual wording: “Indoor unit outlet pipe temperature sensor is disconnected, shorted, or opened.”
Documented for: All LG residential mini-split indoor units
Likely causes, most common first
- Sensor mis-wiring or short at the connector
- Moisture penetration into the sensor
- Bad sensor canning sheath (damaged sensor sheath or insulation)
- Sensor housing removed so the sensor is off the pipe
- Indoor unit PCB fault (only after the sensor itself checks good)
What you can safely check yourself
- Turn the system off at the breaker for one minute, then back on, to see if the code clears
- Check that the indoor unit's front panel and filter access door are fully closed and latched
When to call a technician
The sensor sits on the refrigerant piping inside the indoor unit. Replacing it is a technician job.
A LG mini-split throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.
Sources
- Single Zone Four-Way Ceiling-Cassette Installation Manual (LG Electronics U.S.A., Inc., Single-zone four-way ceiling cassette indoor units with LUU090HV through LUU420HV outdoor units) · checked 2026-08-25
- MULTI F / MULTI F MAX Outdoor Unit Installation Manual (LG Electronics U.S.A., Inc., Multi F and Multi F MAX multi-zone heat pump outdoor units (LMU series) with standard wall-mount, Art Cool, cassette and ducted indoor units) · checked 2026-08-25
- Convertible Mid-Static Ducted LGRED Degree System Installation Manual (LG Electronics U.S.A., Inc., LGRED single-zone convertible mid-static ducted indoor units with LUU180HHV / LUU240HHV outdoor units) · checked 2026-08-25
- Defining Common Error Codes - Standard Wall-Mounted High-Efficiency Single Zone Systems (LG Electronics U.S.A. - Commercial Air Conditioning, LS091HSV and LS121HSV systems (LSN091HSV / LSN121HSV indoor units, LSU091HSV / LSU121HSV outdoor units)) · checked 2026-08-25
- Room Air Conditioner SVC Manual (General) - Trouble Shooting Guide with Error Code (LG Electronics, All LG single-zone room air conditioner / mini-split chassis (SW, SB, SC, S4, S5, SH, SA, SJ, SK)) · checked 2026-08-25