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How old is my Frigidaire furnace or AC?

Type the serial number from the Frigidaire label to see when it was built. Frigidaire units are built by Nordyne (owned by Rheem since 2024), so the serials follow that company's format.

Scan insteadWhere is the label?

Example

FGA030310579
  • FGAProduct code, not part of the date
  • 03Year: 03 = 2003
  • 03Month: 03 = March

Built March 2003

23 years, 7 months old

In replacement window. Inside the usual 15 to 25 year lifespan, so replacement could come any time. Worth budgeting for it.

What to do now

  • Get a replacement quote now, before a breakdown in the hottest or coldest week forces a rushed choice.
  • A common rule of thumb: if the repair cost times the age in years is over 5,000, replacing usually makes more sense.
  • Ask about rebates. Many utilities and states pay toward a high-efficiency replacement.
  • Some home insurers and home buyers’ inspectors ask the age of the HVAC system. Florida 4-point inspections record it.
  • Most HVAC parts warranties run 5 to 10 years and require registration within 60 to 90 days of install. Check with the installer.
How this was read
  1. Skip the first three characters, FGA. They are a product code.
  2. The next two digits, 03, are the year: 2003.
  3. The two digits after that, 03, are the month: March.

Format: Nordyne three-character prefix, year and month. Sources: Energy Trust of Oregon: furnace age brand details (PDF), Building Intelligence Center: Nordyne, Building Intelligence Center: Maytag, Building Intelligence Center: Intertherm.

Reading a Frigidaire serial number

Frigidaire furnaces and central air units are built by Nordyne under license. After a three-character code come the year (2 digits) and the month (2 digits).

Frigidaire units from before 1989 use an older code that the checker does not read.

About Frigidaire

  • Nordyne began licensing the Frigidaire name for heating and cooling in 1997.
  • Rheem bought Nordyne’s parent, Nortek Global HVAC, in October 2024, so Rheem now makes Frigidaire HVAC.
  • The maker builds its units in Saltillo, Mexico, and is based in O’Fallon, Missouri.

Sources: Nordyne Joins (Contracting Business), Rheem Acquires Nortek Global HVAC, Rheem to acquire Nortek Global HVAC (ACHR News)

Nordyne three-character prefix, year and month

Used about 1989 to today. Example: FGA030310579

The serial starts with three characters, then the year (2 digits), then the month (2 digits). FGA 03 03 means March 2003. Frigidaire, Gibson, Maytag, Westinghouse, Intertherm and Miller furnaces share this format.

Worked example: FGA030310579 was built March 2003, so it is 23 years, 7 months old as of October 2026.

Sources: Energy Trust of Oregon: furnace age brand details (PDF), Building Intelligence Center: Nordyne, Building Intelligence Center: Maytag, Building Intelligence Center: Intertherm