How to Read the Appliance Rating Plate
The rating plate on an appliance tells you everything you need for service, parts, and rebates — once you know where to look and what each field means.
Every major appliance has a rating plate — a metal or sticker label that lists the model number, serial number, electrical requirements, and (for gas units) gas type and BTU input. The location varies by category: inside the door frame on washers and dryers, inside the fresh-food compartment on refrigerators (often on the side wall near the top), under the cooktop or behind the storage drawer on ranges, on the inside edge of the door on dishwashers.
The model number is the most-used field on the plate — every parts lookup, service call, and warranty claim begins with it. Write it down (or photograph it) immediately after install and store the photo somewhere you can find it years later. Most home insurance claims for appliance damage require the model and serial number; many people discover this only after the appliance is too damaged to read.
The serial number encodes the production date in a brand-specific code. Whirlpool serial numbers begin with two letters and a digit that indicates year and month; Samsung uses a fifteen-character serial with the year in the first character; LG embeds the year in the third or fourth character. The exact decoding is documented in the brand's service literature or a quick web search.
Electrical specs on the plate (voltage, amps, watts) tell you what circuit the unit needs. For HVAC and ranges, the locked-rotor amps (LRA) and minimum circuit ampacity (MCA) numbers determine the breaker and wire size for installation. For gas units, the BTU input determines venting requirements. Always defer to the rating plate over the spec sheet — the spec sheet is for the model line, the rating plate is for your specific unit and may differ for regional or revision reasons.