Air Conditioner Model Search
How Do You Search for Your Carrier Product's Model Number? Model numbers for Carrier heating and cooling products are often readily identifiable someplace on the unit.

York hvac had two different serial numbers for 1971 through 2004 and 2005 through the present day. Old Serial Number from 1971 – October, 2004 Old Serial Number format look like this: XBFM220710, EADM203490, and BKJM310394. New Serial Number from October, 2004 to the present day New serial number format looks like this.
W0E4298223, N0D6941103, and A0E5219381. Click the link in the bottom of the pages for question Here how to read the old serial number: X B F M 220710 1st digits X is the plant. X was made in Mexican A = Addison B = Blackville C = Canada D = Medina E = Elyria M = Mad’ville N = Norman W = Wichita X = Mexico Y = York 2nd digits B are the month.

Tempstar Air Conditioner Model Number Search
B is in February A = January B = February C = March D = April E = May F = June G = July H = August “I” was skipped “J” was skipped K = September L = October M = November N = December 3rd digits F are the year. F is in 1976 or 1997 A = 1971 or 1992 B = 1972 or 1993 C = 1973 or 1994 D = 1974 or 1995 E = 1975 or 1996 F = 1976 or 1997 G = 1977 or 1998 H = 1978 or 1999 “I” was skipped J = 1979 or 2000 K = 1980 or 2001 L = 1981 or 2002 M = 1982 or 2003 N = 1983 or 2004 (The month October, November, and December does not count with 2004) “O” was skipped P = 1984 “Q” was skipped R = 1985 S = 1986 T = 1987 “U” was skipped V = 1988 W = 1989 X = 1990 Y = 1991 4th digits M are the TYPES OF ITEM.