Brand support status
Every brand below was checked against published serial-number documentation. Some encode the build date and some genuinely do not — where a manufacturer leaves the date out of the serial altogether, no amount of reverse-engineering will put it back, so the honest answer is where the date actually is instead.
| Brand | Status |
|---|---|
| Amana | Automatic decoding — see the year codes |
| ASKO | Published accounts of ASKO's serial number contradict each other — one says the first four digits are the year and the next two the week, another that the first six spell a full date as MMDDYY, a third that the year sits in the first two digits. Any decoder would be picking one at random, so the rating plate's printed production date is the answer to trust. |
| Beko | Automatic decoding — see the year codes |
| Bertazzoni | Bertazzoni does not put the date in the serial number: it prints a separate “Prod. date” field on the rating plate, two digits of week followed by two of year — 4220 is week 42 of 2020. Read that field rather than the serial. |
| Bosch | Automatic decoding — see the year codes |
| Café | Automatic decoding — see the year codes |
| Dacor | Automatic decoding — see the year codes |
| Electrolux | Automatic decoding — see the year codes |
| Fisher & Paykel | Automatic decoding — see the year codes |
| Frigidaire | Automatic decoding — see the year codes |
| GE | Automatic decoding — see the year codes |
| Haier | Automatic decoding — see the year codes |
| Hotpoint | Automatic decoding — see the year codes |
| JennAir | Automatic decoding — see the year codes |
| Kenmore | Kenmore is a Sears label on machines built by other manufacturers, so the serial follows whoever built it rather than any Kenmore scheme. Enter the MODEL number as well as the serial and the tool will do it for you: the first three digits name the maker — 110 is Whirlpool, 253 Frigidaire, 795 LG — and the serial is then read with that maker's scheme. |
| KitchenAid | Automatic decoding — see the year codes |
| LG | Automatic decoding — see the year codes |
| Maytag | Automatic decoding — see the year codes |
| Miele | Miele's serial number is a production sequence, not a date code. Units sold in North America print the manufacture date in plain text on the rating plate, which is the reliable place to read it. |
| Monogram | Automatic decoding — see the year codes |
| Samsung | Automatic decoding — see the year codes |
| Speed Queen | Automatic decoding — see the year codes |
| Sub-Zero | Sub-Zero does not encode the build date in the serial number. On most units it is printed in plain text on the serial tag instead — check there first. If the tag does not show one, Sub-Zero customer care will look the serial up for you. |
| Thermador | Automatic decoding — see the year codes |
| Viking | Automatic decoding — see the year codes |
| Whirlpool | Automatic decoding — see the year codes |
| Wolf | Wolf serial numbers do not carry a date code, and not every model prints a manufacture date on the tag. Sub-Zero/Wolf customer care can look the serial up. |
Why year codes repeat
Many manufacturers encode the production year as a single letter or digit in the serial number, and that letter or digit repeats on a cycle — commonly every 10, 12, 22 or 30 years depending on the brand and platform. A code decoded today as “the newest year that fits” is a defensible guess, not a certainty: the same character could genuinely mean an appliance built a full cycle earlier. When that’s possible, the result is marked medium confidence and lists the other years the same code could mean, oldest first, so you can use a known purchase date to pick the right one.
Worked examples
Each row below is decoded by the same engine that powers the form above, at the moment this page is built — so what you see is exactly what typing that serial in would give you, and it cannot drift out of step with the tool.
| Brand | Serial number | Decoded result | Confidence |
|---|---|---|---|
| Samsung | 0AHQ4BBGB00337B | November 2015 | High |
| Maytag | C44271612 | October 2014 (week 42) | High |
| KitchenAid | F61404017 | April 2016 (week 14) | High |
| GE | LR059433C | June 2020 | Medium — could also be 1984, 1996, 2008 |
| GE | ZR921163S | December 2020 | Medium — could also be 1984, 1996, 2008 |
| Whirlpool | CX4200158 | October 2020 (week 42) | Medium — could also be 1990 |
| Bosch | FD911100449 | November 2011 | High |
| LG | 603KWWZ73713 | March 2026 | Medium — could also be 1996, 2006, 2016 |
Privacy
Serial numbers are sent to our API to compute a result and are not required to be tied to any account. See our privacy policy for details. Do not share a full serial number publicly if you are asking someone else for help — the production code (year/week) is what matters, not the entire unique-unit portion.