Home / Furnaces and AC units / Payne
How old is my Payne furnace or AC?
Type the serial number from the Payne label to see when it was built. Payne units are built by Carrier, so the serials follow that company's format.
Example
- 32Week: 32 (around August)
- 03Year: 03 = 2003
- EPlant: E
Built Week 32 of 2003 (around August)
23 years, 2 months old
In replacement window. Inside the usual 15 to 25 year lifespan, so replacement could come any time. Worth budgeting for it.
How this was read
- The first two digits, 32, are the week of the year.
- The next two digits, 03, are the year: 2003.
- The letter E is the plant that built it. The rest is a running number.
Format: Carrier week, year and plant letter. Sources: Bryant R-22 application and service manual, serial number page, Building Intelligence Center: Carrier, Building Intelligence Center: Bryant, Inspector Handbook: Carrier, Electrical Forensics: air conditioner date codes.
Reading a Payne serial number
Payne is a Carrier brand, now sold under the WeatherMaker name. Its serials use the Carrier format, so 3203E means the 32nd week of 2003.
About Payne
- Carrier has retired the Payne name. Payne is now part of its WeatherMaker brand, and the Payne site still hosts manuals and warranty papers for existing units.
- Payne joined Bryant and Day & Night in Affiliated Gas Equipment in 1949. Carrier bought that company in 1955.
- In the 2010s Payne equipment was sold over the counter at Carrier’s Totaline Sales Centers.
Sources: Payne Has Transitioned To WeatherMaker, Bryant Heating & Cooling: 100 Years of Doing What It Takes, Payne Heating & Cooling: A/C Unit, Heat Pump, Furnaces, Fan Coil
Carrier week, year and plant letter
Used mid-1980s to today. Example: 3203E08663
Carrier, Bryant and Payne serials start with four digits and a letter. The first two digits are the week and the next two are the year. 3203E means the 32nd week of 2003, built at plant E.
Worked example: 3203E08663 was built Week 32 of 2003 (around August), so it is 23 years, 2 months old as of October 2026.
Sources: Bryant R-22 application and service manual, serial number page, Building Intelligence Center: Carrier, Building Intelligence Center: Bryant, Inspector Handbook: Carrier, Electrical Forensics: air conditioner date codes
Carrier 1980 to 1984 month letter and year digit
Used 1980 to 1984. Example: W4D14008
From 1980 to 1984 the serial starts with a month letter (M is January, O and U are skipped) and a year digit from 0 to 4. W4 means September 1984. Units built in Canada put the digit first.
Worked example: W4D14008 was built September 1984, so it is 42 years, 1 month old as of October 2026.
The full lookup tables are on the Carrier page, since Payne uses the same code.
Sources: Bryant R-22 application and service manual, serial number page, Building Intelligence Center: Carrier, Building Intelligence Center: Bryant, Inspector Handbook: Carrier, Electrical Forensics: air conditioner date codes
Carrier 1980s year and month
Used late 1980s. Example: 850304091
Some 1980s Carrier, Bryant and Payne serials are 9 digits with no letter. The first two digits are the year and the next two are the month. 8503 means March 1985.
Worked example: 850304091 was built March 1985, so it is 41 years, 7 months old as of October 2026.
Sources: Bryant R-22 application and service manual, serial number page, Building Intelligence Center: Carrier, Building Intelligence Center: Bryant, Inspector Handbook: Carrier, Electrical Forensics: air conditioner date codes
Payne recalls
Recalls from the U.S. Consumer Product Safety Commission that name Payne. Whether a unit is included depends on its model and build date; the checker above flags matches.
| Year | Recall | Hazard |
|---|---|---|
| 1996 | Ducane-built oil furnaces sold under many brands | The heat exchanger can crack. |