The serial number on an LG washer is used for servicing machines under the manufacturer's warranty. The company requires customers contacting the repair service to provide the machine's serial number and proof of purchase.
The model number and serial number can also be used to identify machines subject to recall notices by LG. A label on the rating plate, which can be found at the back and top of the washing machine, lists the serial number. Recall notices list ranges of serial numbers to identify machines.
Information on the warranty and repair options requiring the serial number are available in the product packaging.