How old is my Goodman HVAC?
Goodman serial numbers begin with the date: the first two digits are the year and the next two are the month, followed by a production sequence.
The same decoder works for: Amana, Janitrol, Daikin.
Free. The serial is on the metal nameplate or rating label, usually near the bottom of the unit.
Goodman serial-number formats
| Era | Format | Confidence |
|---|---|---|
| 1990s–present | a serial that starts with two-digit year then two-digit month, followed by a production number | high |
Worked examples
1805123456
→ manufactured May 2018 (about 8 years old). Read as a serial that starts with two-digit year then two-digit month, followed by a production number. Decoded year 2018 (digits "18"), month May (digits "05") → manufactured May 2018, about 8 years old.
Frequently Asked Questions
How do I find the age of my Goodman unit?
Goodman serial numbers begin with the date: the first two digits are the year and the next two are the month, followed by a production sequence. Enter the serial from the unit's nameplate into the decoder on this page and it returns the manufacture date and age instantly. Always confirm against the manufacture date printed on the nameplate.
Where is the serial number on a Goodman HVAC?
The serial number is printed on the metal data plate or rating label, usually near the bottom or on the side of the unit. It is labeled "Serial," "Serial No.," or "S/N." Do not confuse it with the model number.
Is the Goodman serial-number date exact?
It identifies the manufacture date, not the install date — a unit is often installed weeks or months after it was built. Verify against the manufacture date on the nameplate when one is printed.
Developers & AI agents: the Goodman decode rules are available as JSON.
Serial-number decoding is approximate. Results are estimates based on published manufacturer formats; always verify against the manufacture date printed on the unit nameplate. ApplianceAge is a CarWhere tool and is not affiliated with, endorsed by, or sponsored by any manufacturer. Brand names are used only to identify the equipment a serial belongs to.