How old is my Coleman unit?
Coleman is part of Bosch Home Comfort (ex JCI / York). 4 serial formats sourced across central air conditioner, heat pump, furnace.
Serial number decoder for Coleman
Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.
Format example: W0K5896070
- Coleman air conditioner serial numbers in the 2004 to present format encode the year as digit 2 + digit 4 concatenated (0+5 = 2005) and the month as letter 3 (table below) (source: building-center.org).
- Example: serial W0K5896070 decodes to September 2005.
- Coleman air conditioner serial numbers in the 1971 to 2004 format encode the year as letter 3 via 21-letter table (table below) and the month as letter 2 (A-N, I/J skipped like style 1) (source: building-center.org).
- Example: serial WAKM011379 decodes to 1980 or 2001 (January).
- The 1971 to 2004 format is ambiguous: Letters A-N repeat (1971-1984 vs 1992-2004): 21-year cycle. Some serials carry a parenthesized leading letter e.g. (S)EBHM062202 - ignore it. Style ran to Oct 2004, so 2004 has BOTH styles.
- Coleman air conditioner serial numbers in the 1992 to 2004 format encode the year as digits 1-2 (YY = 1999) and the month as digits 3-4 (06 = June) (source: building-center.org).
- Example: serial 990697368 decodes to June 1999.
- Coleman's official lookup at york.bosch-hcgroup.com returns warranty details ('HVAC WARRANTY LOOKUP').
Decoder pages by product
Format eras
- 2004 to present VERIFIED
A#A#######Central Air Conditioner, Heat Pump, Furnace, Packaged Unit - 1992 to 2004 VERIFIED
#########Central Air Conditioner, Heat Pump, Furnace, Packaged Unit - before 1991 VERIFIED
##########Central Air Conditioner, Heat Pump, Furnace, Packaged Unit - 1971 to 2004 VERIFIED
AAAA######Central Air Conditioner, Heat Pump, Furnace
Official lookup: the authority
Open the official Coleman lookup takes serial; returns warranty details ('HVAC WARRANTY LOOKUP'); URL partial
Open the official Coleman lookup takes serial number; returns warranty / registration lookup; URL verified live
This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.
What we could not confirm
- York UPG bought Coleman's HVAC division from Evcon Industries in 1996 (chart footer). Styles 1-2 = York 2004+ and 1971-2004 rules (charts transcribed here match formats.json York tables exactly: plants A/N/S/W and A/B/C/D/E/M/N/W/X/Y, month A-N skipping I/J, 21-year letter cycle, item-type letter M/P/S/T/Y/Z/O). Two Coleman-specific numeric styles (1992-2004 YYMM+5; pre-1992 MMYY+6) added as rules. Warranty page is a JS app (curl 200, 85 chars of text).
Sources
- https://www.building-center.org/york/
- img: YORK-Serial-Number-Style-1.jpg (transcribed)
- img: YORK-Serial-Number-Style-2.jpg (transcribed)
- https://www.building-center.org/coleman-hvac-age/
- https://www.building-center.org/evcon-hvac-age/
- https://www.building-center.org/fraser_johnson-hvac-age/
- img: COLEMAN-Date-of-Manufacture-Serial-Number-Style-3.jpg (transcribed)
- https://www.building-center.org/luxaire-hvac-age/
- img: COLEMAN-Date-of-Manufacture-Serial-Number-Style-4.jpg (transcribed)
- https://york.bosch-hcgroup.com/residential-equipment/warranty-and-registrationofficial
- https://www.colemanac.com/residential-equipment/warranty-and-registrationofficial