How old is my Goodman furnace?
Serial number age decoder for Goodman furnaces: 1 format era, the decode rule in plain English, transcribed tables, and the official lookup.
Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.
Format example: 9704011000
- Goodman furnace serial numbers in the era not stated format encode the year as digits 1-2 (YY) and the month as digits 3-4 (source: building-center.org).
- Example: serial 9704011000 decodes to April 1997.
- Goodman's official lookup at warranty.goodmanmfg.com returns entitlement / warranty (ship-date output not confirmed).
Format eras
- era not stated PARTIAL
##########digits 1-2 (YY)
How to read the serial
era not stated formatPARTIAL
Shape ########## · example 9704011000 · confidence medium
- Year
- digits 1-2 (YY)
- Week or month
- month = digits 3-4
Example: serial 9704011000 decodes to April 1997.
Where the data plate is on a furnace
Inside the furnace: remove the upper (burner) access door and look on the inside of the door, on the blower compartment wall, or on a sticker facing you at the burner deck.
General guidance, not brand-specific: the owner's manual or the installer can point to the exact spot. See the data plate guide.
For scale only: the InterNACHI Standard Estimated Life Expectancy Chart for Homes lists Furnace at 15 to 25 years of expected service (nachi.org). That chart is a guideline, not a prediction for your unit.
Open the official Goodman lookup takes serial; returns entitlement / warranty (ship-date output not confirmed); URL verified live
This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.
What we could not confirm
- The era not stated format is only partially confirmed (VERIFIED-partial).
Sources
- https://www.building-center.org/goodman/
- https://warranty.goodmanmfg.com/entitlement/GenericEntitlementLookup.htm?site=Goodmanofficial
Frequently asked questions
How do I tell the age of a Goodman furnace from the serial number?
In the era not stated format the year is digits 1-2 (YY) and the month as digits 3-4. Example: serial 9704011000 decodes to April 1997.
Where is the serial number on a Goodman furnace?
On the data plate. Inside the furnace: remove the upper (burner) access door and look on the inside of the door, on the blower compartment wall, or on a sticker facing you at the burner deck.