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How old is my Bryant unit?

Bryant is part of Carrier Global. 6 serial formats sourced across central air conditioner, heat pump, furnace, packaged unit.

Serial number decoder for Bryant

Serial no.

Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.

Format example: 4006A17330

Bryant air conditioner serial numbers in the 1980 to present format encode the year as digits 3-4 (2-digit year; century by context, 1980+) and the week as digits 1-2 (01-53) (source: building-center.org).
Example: serial 4006A17330 decodes to week 40 of 2006.
Bryant air conditioner serial numbers in the 1980 to 1989 format encode the year as digits 1-2 and the month as digits 3-4 (source: building-center.org).
Example: serial 850304091 decodes to March 1985.
Bryant air conditioner serial numbers in the 1980 to 1984 format encode the year as digit 2 (table below) and the month as letter 1 via table (M-Z skipping O and U) (source: building-center.org).
Example: serial W4D14008 decodes to September 1984.
Bryant's official lookup at bryant.com returns general parts warranty period.

Decoder pages by product

1980 to present VERIFIED
####A#####Central Air Conditioner, Heat Pump, Furnace, Packaged Unit
1980 to 1989 VERIFIED
#########Central Air Conditioner, Furnace
1980 to 1984 VERIFIED
A#A#####Central Air Conditioner, Heat Pump, Furnace, Packaged Unit
1980 to 1984 VERIFIED
#AA#####Central Air Conditioner, Heat Pump, Furnace, Packaged Unit
1969 to 1979 VERIFIED
A######Central Air Conditioner, Furnace
1960 to 1979 VERIFIED
##A######Central Air Conditioner, Heat Pump, Furnace, Packaged Unit

Official lookup: the authority

Open the official Bryant lookup takes serial number + original-owner Y/N; returns general parts warranty period; URL verified live

This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.

Bryant is treated as sharing Carrier's format because the source lists it in that family; the corporate relationship itself is an estimate.
Building-center Bryant page = Carrier styles 1-5 (0709G10932 WWYY-L-#####; 850304091 YYMM 1980s; W4D14008 1980-84 BDP; A167890 1970-79; 46U152456 1960-79). Warranty page has a serial-number lookup (curl 200, form text confirmed). BDP = Bryant/Day & Night/Payne, the Carrier subsidiary that built 1980s units.