LG Heat Pump Error Code 06

Error code 06 on an LG heat pump indicates an open or short circuit has been detected in the indoor unit outlet pipe temperature sensor. This NTC thermistor monitors refrigerant temperature at the indoor heat exchanger outlet and sends that data to the control board. When the sensor signal falls outside the valid resistance range, the unit shuts down and displays this code. The problem can be caused by a failed sensor, a loose connector, or damaged wiring.

No. When error code 06 is active, the heat pump typically shuts down operation to protect the system from running without accurate temperature feedback. Attempting to override or ignore this fault could result in undetected overheating or abnormal refrigerant pressures. The fault should be diagnosed and corrected before resuming normal use.

A power reset may temporarily clear the error code, but it will return as soon as the control board checks the sensor signal again and detects the same open or short circuit condition. Resetting alone does not fix the underlying electrical or component fault. The sensor connection and sensor resistance must be inspected and corrected for the code to clear permanently.

A knowledgeable DIYer can inspect and reseat the sensor connector at the PCB, which sometimes clears the fault if a loose connection is the cause. Testing sensor resistance with a multimeter after unplugging it is also within reach for someone comfortable working with electronics. However, if the sensor or PCB needs replacement, and the system requires refrigerant handling, a licensed HVAC technician should complete the repair.

If only a connector needs reseating, there may be no parts cost, though a service call fee typically runs in the range of $75 to $150. Replacing the outlet pipe temperature sensor is generally an inexpensive repair, with parts and labor typically ranging from $100 to $250 depending on the technician and location. If the indoor PCB is at fault, costs can rise significantly, often falling in the $300 to $600 range or higher for parts and labor.