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Error code reference

LG Air Conditioner Error Code 162

Discharge temperature sensor of constant speed compressor 1 of sub3 outdoor unit is open or short.

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What the 162 error code actually means

Your LG air conditioner's outdoor unit has detected a problem with a small temperature sensor attached to one of its compressors. That sensor is either not sending any signal at all or is sending a signal that is clearly wrong, so the system shut down that compressor to prevent damage. A technician will need to inspect the wiring and the sensor itself to get the system running again.

Diagnostic procedure

The full 162 procedure

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First diagnostic step
Check if sensor connection to PCB is normal.
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Most common causes of 162

Ranked by how often they cause this code
  1. 1Loose or disconnected sensor connector at PCB
  2. 2Failed discharge temperature sensor (thermistor)
  3. 3Damaged or broken sensor wiring harness
  4. 4Corroded or oxidized connector pins
  5. 5Faulty outdoor unit PCB

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Questions people ask about 162

What does 162 mean on a LG air_conditioner?
Error code 162 means the discharge temperature sensor on constant speed compressor 1 of the sub3 outdoor unit has been detected as open or short circuited. The PCB cannot read a valid temperature from this sensor, so it shuts down that compressor to prevent damage. The fault lies somewhere in the sensor itself, the wiring harness, or the connector at the PCB.
Is it safe to keep running my LG air conditioner with error code 162 active?
No. Error code 162 causes the affected compressor circuit to shut down as a protective measure. Attempting to override or ignore this fault and force the system to run without a valid discharge temperature reading risks severe compressor damage from undetected overheating. The system should remain off until the fault is diagnosed and repaired.
How much does it cost to repair error code 162 on an LG air conditioner?
If only the sensor requires replacement, repair costs typically fall in the range of $75 to $200 including parts and labor, depending on parts availability and local labor rates. If the fault involves harness repair or PCB replacement, costs can range from $150 to $600 or more. A technician diagnosis visit is usually required first to confirm exactly which component has failed.
Can I fix error code 162 myself?
A homeowner can safely inspect and reseat the sensor connector at the outdoor PCB without working on refrigerant or live voltage. However, measuring sensor resistance, tracing wiring faults, and replacing PCB components require electrical knowledge and proper tools. If reseating the connector does not resolve the fault, a qualified HVAC technician should complete the diagnosis.
Will resetting my LG air conditioner clear error code 162?
A power reset may temporarily clear the error and allow the unit to restart, but the code will return as soon as the PCB reads the sensor signal again and detects the open or short condition. A reset does not fix the underlying fault. The sensor, wiring, and connector must be inspected and repaired to permanently resolve the error.

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