On a Whirlpool washer, the serial number is unique to a specific washer, but the same model number may be applied to hundreds or thousands of washers. Each number serves a specific purpose.
The serial number acts as a code that identifies the washer's exact manufacturing date. This number is needed if the washer requires service, because it can help determine if the washer is still covered by a warranty. The model number identifies a set of features that are on a washer, which helps buyers differentiate between one washer and another. The model number and serial number for a Whirlpool washer are located on the rim of the washer basket underneath the lid.