HVAC Code Lookup

LG Mini-Split: 6 Flashes

A LG mini-split LED pattern starting with 6 flashes matches 7 documented codes: CH06, CH60, CH61, CH62, CH63, CH65, CH67. Watch the full pattern (short vs. long flashes) to tell them apart — all 7 are explained below.

Code CH06: Indoor unit outlet pipe sensor error

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

  1. Sensor mis-wiring or short at the connector
  2. Moisture penetration into the sensor
  3. Bad sensor canning sheath (damaged sensor sheath or insulation)
  4. Sensor housing removed so the sensor is off the pipe
  5. 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

Full page for LG code CH06

Code CH60: Outdoor unit PCB EEPROM check sum error

Hard lockoutShown as: Outdoor LED01 (red) blinks 6 times, LED02 (green) does not blink

Outdoor unit PCB EEPROM check sum error. The memory chip on the outdoor control board that stores the unit's identity and factory parameters failed its integrity check.

Manual wording: “Outdoor unit printed circuit board (PCB) EEPROM check sum error”

Documented for: All LG residential mini-split outdoor units

What you can safely check yourself

  • Turn the system off at the breaker for three minutes and back on

When to call a technician

A failed EEPROM checksum means the outdoor control board cannot trust its own configuration. A technician has to replace the board.

A LG mini-split throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.

Sources

Full page for LG code CH60

Code CH61: Outdoor unit condenser coil pipe temperature is too high

Soft lockoutShown as: Outdoor LED01 (red) blinks 6 times, LED02 (green) blinks 1 time

Outdoor unit condenser coil pipe temperature is too high. In cooling this means the outdoor unit is overheating; in heating it means the indoor coil is overheating. In both cases the system cannot get rid of the heat it is making.

Manual wording: “Condenser coil thermistor temperature is too high”

Documented for: All LG residential mini-split outdoor units

Likely causes, most common first

  1. Overload operation - indoor or outdoor fan restricted, screened, or blocked
  2. Heat exchanger (coil) contaminated with dirt, lint, cottonwood, or grass clippings
  3. Poor condenser pipe sensor assembly or burned sensor
  4. EEV connector displaced or poor EEV assembly
  5. Refrigerant overcharged

What you can safely check yourself

  • Clear leaves, grass clippings, cottonwood, snow, or debris away from the outdoor coil and fan
  • Remove anything stacked against or on top of the outdoor unit, and check there is clear space all around it
  • Check and clean the indoor air filters
  • Make sure the indoor supply and return grilles are open and unblocked
  • Let the unit cool, then turn it off at the breaker for three minutes and back on

When to call a technician

If airflow is clear on both units and CH61 returns, the coil needs a proper cleaning or the charge and expansion valve need checking. Call a technician.

A LG mini-split throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.

Sources

Full page for LG code CH61

Code CH62: Outdoor unit inverter compressor PCB heat sink temperature is too high

Soft lockoutShown as: Outdoor LED01 (red) blinks 6 times, LED02 (green) blinks 2 times

Outdoor unit inverter compressor PCB heat sink temperature is too high. The aluminium heat sink that cools the inverter power module is overheating, usually because the outdoor unit is in a hot, cramped spot or its airflow is blocked.

Manual wording: “Outdoor unit inverter compressor PCB heat sink temperature is too high”

Documented for: All LG residential mini-split outdoor units

Likely causes, most common first

  1. Improper installation environment (outdoor unit in a tight, unventilated location)
  2. Overload operation - outdoor fan restricted, screened, or blocked
  3. Poor PCB heat sink assembly (heat sink not making good contact)
  4. Poor PCB temperature sensing circuit parts

What you can safely check yourself

  • Clear leaves, grass clippings, snow, or debris away from the outdoor coil and fan
  • Remove anything stacked against or on top of the outdoor unit and give it clear space on all sides
  • Check nothing is blowing hot exhaust (dryer vent, another condenser) into the outdoor unit
  • Let the unit cool, then turn it off at the breaker for three minutes and back on

When to call a technician

If the outdoor unit has clear airflow and CH62 returns, the heat sink mounting or its sensor is at fault and needs a technician. If the unit is genuinely in too tight a space, it may need relocating.

A LG mini-split throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.

Sources

Full page for LG code CH62

Code CH63: Condenser coil pipe thermistor temperature is too low

Soft lockoutShown as: Outdoor LED1 blinks 6 times, LED2 blinks 3 times

Condenser coil pipe thermistor temperature is too low. In heating mode this typically means the outdoor coil is icing or the system is not absorbing heat.

Manual wording: “Condenser coil pipe thermistor temperature is too low.”

Documented for: LS091HSV / LS121HSV systems (LSU091HSV / LSU121HSV outdoor units)

What you can safely check yourself

  • Clear snow and ice away from around, under, and on top of the outdoor unit
  • Make sure the outdoor unit is not sitting in a drift or a spot where roof runoff pours onto it
  • Check and clean the indoor air filters

When to call a technician

If the outdoor unit is clear of snow and CH63 returns, the defrost system, charge, or the coil sensor needs a technician. Do not chip ice off the coil - the fins and refrigerant tubing damage easily.

A LG mini-split throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.

Source

Full page for LG code CH63

Code CH65: Heat sink thermistor is disconnected or shorted out

Soft lockoutShown as: Outdoor LED01 (red) blinks 6 times, LED02 (green) blinks 5 times

Heat sink thermistor is disconnected or shorted out. The sensor that monitors the inverter power module's heat sink is not reporting.

Manual wording: “Heat sink thermistor is disconnected or has shorted out”

Documented for: All LG residential mini-split outdoor units

Likely causes, most common first

  1. Sensor mis-wiring or short at the connector
  2. Moisture penetration into the sensor or bad canning sheath on the sensor wire

What you can safely check yourself

  • Turn the system off at the breaker for three minutes and back on

When to call a technician

The heat sink sensor sits on the live inverter board assembly. Technician only.

A LG mini-split throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.

Sources

Full page for LG code CH65

Code CH67: Outdoor BLDC fan motor lock error

Hard lockoutShown as: Outdoor LED01 (red) blinks 6 times, LED02 (green) blinks 7 times

Outdoor BLDC fan motor lock error. The outdoor fan is not turning when the board tells it to - usually something is physically jamming it (ice, leaves, a stick), or the motor or its connector has failed.

Manual wording: “Outdoor unit brushless direct current (BLDC) fan motor lock error”

Documented for: All LG residential mini-split outdoor units with BLDC fan motors

Likely causes, most common first

  1. Fan locked by physical force (foreign object stuck in the motor or blade)
  2. Poor connection of the motor connector
  3. Motor failure
  4. PCB failure

What you can safely check yourself

  • Turn the outdoor unit off at the breaker first, then look through the grille for leaves, sticks, ice, or debris jamming the fan blade
  • Clear snow and ice from around, under, and on top of the outdoor unit
  • Once the obstruction is removed and the breaker is back on, try the system again

When to call a technician

If nothing is jamming the fan and CH67 returns, the fan motor or the outdoor control board has failed. Never reach into the outdoor fan with power on.

A LG mini-split throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.

Sources

Full page for LG code CH67

Other LG codes