Serial Number Interpretation - LG LWHD1006R Training Manual

SERIAL NUMBER
The serial number is unique to each product. It is required to be paid for
warranty service and to get the correct part in the event a running
production change was made.
Some models may have four (4) letters instead of two (2) for the product
code number. The third and fourth letters are significant only to the
manufacturing facility.
LWHD1006R Page 4 of 40 Training Manual