LG Heat Pump Error Code E182

E182 indicates that the LG heat pump's piping check routine detected no temperature change at the evaporator outlet during its commissioning test. This means the system could not confirm that refrigerant is flowing through the indoor unit coil. The most common causes are an indoor unit address mismatch with the MCU or a problem with the electronic expansion valve connection to the indoor PCB.

E182 indicates a failure during the piping check sequence, which means the system has not confirmed proper refrigerant flow through the indoor unit. Continuing to operate the system in this state could result in inadequate heating or cooling and potential stress on components. It is advisable to resolve the error before returning the unit to normal operation.

Repair costs vary depending on the root cause. If the issue is simply a loose connector or an address setting correction, a service call fee in the range of $80 to $150 may be the primary expense. If the EEV or EVAP OUT temperature sensor needs replacement, parts and labor combined typically range from $200 to $600 or more, depending on the model and local labor rates.

Some causes of E182, such as a loose EEV wiring connector or an incorrect unit address setting, can be identified by a knowledgeable DIYer familiar with HVAC control wiring. However, diagnosing MCU address configurations, testing EEV resistance and operation, and verifying sensor readings typically requires familiarity with heat pump control systems and appropriate tools. If you are not comfortable working with control boards and low-voltage wiring, it is best to contact a qualified technician.

A power reset may clear the error display temporarily, but E182 will return if the underlying cause is not corrected. Because this error is triggered by the piping check routine, the fault condition such as an address mismatch, faulty EEV connection, or defective sensor must be resolved before the piping check can complete successfully and the code will no longer appear.