LG Air Conditioner Error Code E296

E296 indicates that the LG air conditioner has detected either refrigerant leakage or an electrical fault (short or open circuit) in the low pressure sensor circuit. The unit monitors suction-side pressure through this sensor, and when the signal falls outside acceptable limits the system shuts down to protect the compressor. The fault could be as simple as a disconnected sensor connector or as serious as a refrigerant leak requiring repair and recharge.

No, you should not attempt to operate the unit while E296 is active. The system shuts down specifically to prevent the compressor from running in a low-pressure condition, which can cause compressor damage. Continuing to force operation could result in costly compressor failure on top of the original fault.

A power reset may temporarily clear the error display, but E296 will return if the underlying fault has not been corrected. If the cause is a loose sensor connector, reconnecting it before resetting could resolve the issue permanently. If a sensor failure or refrigerant leak is present, the error will reappear once the unit attempts to operate and the PCB again reads an out-of-range pressure signal.

A homeowner can safely check whether the low pressure sensor connector is disconnected from the PCB, which is the first recommended diagnostic step. However, diagnosing sensor circuit voltage (5V at pins 3 and 4) and any refrigerant-related work requires proper tools, training, and in most regions a refrigerant handling certification. If a refrigerant leak is involved, repair and recharge must be performed by a licensed technician.

Repair costs vary depending on the root cause. Replacing a faulty low pressure sensor typically runs in the range of $80 to $200 including parts and labor. If refrigerant leakage is involved, leak detection, repair, and recharge can add $150 to $500 or more depending on the leak location and the amount of refrigerant required. A simple connector reconnection may cost only a basic diagnostic service call fee.