LG Heat Pump Error Code E112

E112 on an LG PAC heat pump indicates a Perfect fan sensor error. The control board has detected a problem with the sensor that monitors the indoor fan motor and cannot confirm normal fan operation. The unit will typically stop running until the fault is diagnosed and cleared.

No. The E112 code indicates the system cannot confirm the indoor fan is operating correctly, and the unit will generally shut itself down automatically. Attempting to force the unit to run without a functioning fan risks overheating internal components and causing additional damage. The fault should be diagnosed and repaired before resuming normal operation.

A power reset may temporarily clear the E112 code, but if the underlying fault with the fan sensor or its circuit has not been resolved, the error will return once the unit attempts to run the fan again. A reset is useful for confirming whether the fault is intermittent, but it is not a repair. Persistent E112 codes require hands-on diagnosis of the fan sensor, wiring, and motor.

Some basic checks, such as inspecting the fan for obstructions or verifying that wiring connectors are firmly seated, can be done by a knowledgeable DIYer. However, testing the fan sensor directly and replacing internal components typically requires disassembling the PAC unit and should be handled by a qualified technician. Working inside a heat pump also involves exposure to electrical components that require caution.

Repair costs vary depending on the root cause. A simple wiring repair or connector fix may cost between $75 and $150 in labor. Replacing the fan sensor or fan motor can range from $150 to $450 or more depending on parts and labor rates in your area. Control board replacement is typically the most expensive outcome, often ranging from $300 to $700 or higher.