Payne serial age
Manufacture date from the rating-plate serial. Same family as Carrier, Bryant. A printed MFR date on the plate still wins.
Payne
Type the serial off the rating plate. Spaces and hyphens are ignored. Manufacture date is not the install date.
Diagnose this call
Age is open. The walkthrough is the seat.
Where the plate is
Same rating-plate locations as Carrier.
Styles
1980–present
4006A17330
Week (positions 1–2) then year (positions 3–4).
1980s
850304091
Nine-digit numeric: year then month.
Same date-code family: Carrier, Bryant.
Cross-checked against Payne HVAC age. FieldBench does not host or republish that page. Letter charts we could not verify are linked out instead of invented.