LG Washer Error Code E-12

The E-12 error code on an LG washer indicates a gas sensor short error. The machine's control system has detected that both terminals of the gas sensor are shorted together, meaning there is an unintended electrical connection where there should not be one. The washer stops operation and displays this code to alert you that the sensor circuit needs to be inspected and the short removed before normal use can resume.

Yes, because E-12 involves a gas sensor circuit, it should be taken seriously and not ignored. A shorted sensor cannot provide accurate readings, which means the machine cannot properly monitor gas-related conditions during operation. It is best to avoid running the washer until the short has been identified and corrected to ensure safe operation.

A simple reset will likely clear the error code temporarily, but the fault will return as soon as the washer checks the sensor circuit again if the underlying short has not been repaired. Resetting without fixing the problem does not resolve the issue and means the machine is operating with a compromised sensor. The short must be physically identified and removed for the error to clear permanently.

If you are comfortable working with appliance wiring, you can begin by inspecting the gas sensor terminals and the wiring harness for visible damage, pinched wires, or moisture buildup. Cleaning a contaminated connector or carefully separating shorted wiring may resolve the fault without replacing any parts. However, if the sensor itself has failed internally, replacing the component is necessary, and given that this involves a gas-related sensor, a qualified technician is recommended if you are unsure of the repair.

Repair costs depend on what is causing the short. If the fix involves cleaning a connector or repairing a section of wiring, costs may be relatively low, typically in the range of $50 to $150 for a service call. If the gas sensor itself needs to be replaced, parts plus labor could bring the total to somewhere between $100 and $300 depending on your location and the technician's rates.