North American household appliances with matching Whirlpool nomenclature; water heaters only after explicit manufacturer-family confirmation.
Explore a sourced example:
Choose the equipment family
Whirlpool serial numbers by device type
Match the product, manufacturer and documented serial layout before interpreting a date. The model is a separate label field; a date code alone does not identify capacity, installation date or warranty entitlement.
Whirlpool water heaters
For Whirlpool water-heater labels: the historical chart associates this label with American water heaters. A confirmed American tank may encode the two-digit year followed by the production week. This format is separate from appliance codes and does not encode the complete model. Confirm the builder and matching serial layout before choosing a system.
Find the label: Whirlpool Water Heaters identifies the serial label near the bottom of the heater.
The household-appliance decoder supports its documented production-year and week systems, including historical cycles. Use the actual washer, dryer, refrigerator or other appliance model. Water-heater rules require confirmed water-heater context.
The model, exact factory, capacity, installation date and warranty status cannot be recovered from these serial positions.
The household-appliance rules exclude water heaters, HVAC and European service-code systems. Choose a separate confirmed water-heater family only when the unit label supports it.
Enter the separate model number from the rating plate to search for the correct manual. These date positions do not establish a full model, capacity, fuel type or warranty entitlement.
The historical inspection chart is secondary evidence of listed brand relationships, not proof of the manufacturer, product family or date system on a particular unit. Confirm the actual label and select the matching system explicitly.
A missing match does not establish age, authenticity or condition. Unsupported eras and device types require the manufacturer or model-specific documentation.
Research reviewed October 16, 2026. This independent tool applies published rules and retains unresolved years and model candidates.
Whirlpool North American year/week system (1970–2026 candidates)
Matching North American Whirlpool-built household appliances. Source/manufacturer confirmation is required for private labels and product-specific exceptions.
Week 01–53; no conversion to an exact manufacture day. Numeric year codes have historic 1970s/1980s alternatives for pre-acquisition Whirlpool systems. 2023–2026 letters are verified by AppliancePartsPros’ named technician; 2019–2022 directly corroborated by manufacturer manual. Source-prefix interpretation is not a model decoder. Water heaters, HVAC and commercial MXR washers excluded.
Whirlpool North American year/week system (1970–2026 candidates) (confirmed two-letter prefix)
Matching North American Whirlpool-built household appliances. Source/manufacturer confirmation is required for private labels and product-specific exceptions.
Week 01–53; no conversion to an exact manufacture day. Numeric year codes have historic 1970s/1980s alternatives for pre-acquisition Whirlpool systems. 2023–2026 letters are verified by AppliancePartsPros’ named technician; 2019–2022 directly corroborated by manufacturer manual. Source-prefix interpretation is not a model decoder. Water heaters, HVAC and commercial MXR washers excluded.
Confirm that the label/service manual uses a two-letter manufacturing/source prefix; length alone cannot establish this.
Confirmed water-heater family: Water heaters: year and production week
Water heaters only after confirmation of this manufacturer, product family, date-code layout and documented era.
YYWW: first two digits year; next two production week. The 2024 manufacturer guide permits week 53. No model, capacity, fuel or installation date is encoded by these four digits. 2008 is a conservative supported-range limit, not an asserted universal changeover. The October 2016 SAP change uses a 13-character printed date-plus-serial. A bare nine-digit barcode/SAP serial has NO date code and is deliberately not decoded. The supplied historical inspection chart lists additional names, but that relationship does not prove the manufacturer of every product bearing the same brand. This option requires independent confirmation from the unit label or model-specific documentation.
Confirm that this is a water heater and that its rating plate or model-specific manufacturer documentation uses this exact numbering family. A historical brand list or a matching serial shape alone is insufficient.
Historical American-family supplied-chart YYWW system
Historical 2010 TIJ chart’s American/Craftmaster/Mor-Flo/private-label list only, with explicit water-heater/manufacturer confirmation.
This is secondary-chart evidence, not a currently manufacturer-verified universal rule. The supplied anonymized 9746******means year ending 97/week 46 in its 1997 worked context.2010 is a conservative reviewed-publication horizon, not a claim the system endedthen. The chart’s American acquisition year 2001 is wrong; ownership history must not establish a serial-era cutoff.
Select only after confirming the water heater or boiler family and numbering system described here. Brand ownership alone does not establish this system.
Reading your result
Whirlpool lookup questions
Why does the year code match more than one year?
Some systems reuse letters or only encode the last one or two year digits. Every supported interpretation is retained. A decade supplied from reliable records can narrow the reading; the tool does not automatically pick the newest year.
Does the serial identify my exact model?
Usually the model is a separate plate field. Where published serial ranges actually identify a model, the result shows model candidates and links to their manuals. Overlapping ranges remain ambiguous.
Can I share the result?
After a lookup, the address includes the serial in a fragment beginning with #serial=. Use “Copy share link” to share the serial and selected context. Opening the link runs the same lookup. The fragment is not a query-string result page.