Manufacturer data plates details

GOODMAN® furnace or other GOODMAN® HVAC equipment
Serial number first 4 digits tell manufactured year and date. I.E.
Serial number is 9704011000. 97 is manufactured year and 04 is manufactured month.


LENNOX® furnace or other LENNOX® HVAC equipment 
Style 1:  5601D 08696 (or 5601D08696)
01 is year and D is month. D represents April. Stating from A represented Jan.

Style 2:  C89274AAC
First A is month and second A is year. First A is Jan and second A is 1980

Style 3:  15A67 JA098
15 is day, A is month and 67 is year.

Style 4:  4140720328
03 is year and 28 is week.


YORK® furnace or other manufactured YORK® HVAC unit
Style 1:  W0K5896070  (Oct. 2004 and later)
W is manufactured plant. 2nd digit and 4th digit combination represents year. I.E. 05. K represents September.

Style 2:  WAKM011379  (1971 - Oct. 2004)
W is manufactured plant. A is month, Jan. K is year, 1980 or 2001. M is type of item.