How to determine the date of production/manufacture or age of Payne® HVAC Systems.

The date of production/manufacture or age of Payne® HVAC equipment can be determined from the serial number located on the data plate.

Parent Company:  Carrier Corporation a subsidiary of UTC Climate, Controls & Security Systems, a subsidiary of United Technologies Corp.
Sister or similar Brands Include:  Aquazone® | BDP® | Carrier® | Day&Night® | Payne® | Weathermaster®

Example serial number styles/formats found:

  • Style 1: 4006A17330
  • Style 2:  850304091
  • Style 3:  W4D14008
  • Style 4:  A167890
  • Style 5:  6######

Style 1:  4006A17330

Description: Ten (10) character Serial number begins with four (4) numerical digits followed by one (1) letter and ends with five (5) numerical digits.
Week of manufacture is 1st-2nd character numerical digits.
Year of manufacture is 3rd-4th character numerical digits

Style 2:   850304091

Description: Nine (9) character all numerical Serial number.
Year of manufacture is 1st-2nd numerical digits
Month of manufacture is 3rd-4th numerical digits.

Style 3:   W4D14008 (Only used from 1980 – 1984)

Description:  Eight (8) character serial number begins with one (1) letter followed by one (1) numerical digit and then another letter digit and ends with five (5)  numerical digits.
Month of manufacture is 1st digit of the serial number.  (See chart below).
Year of manufacture 2nd digit of the serial number. (See chart below).

Style 4:   A167890  (Only used from 1970 – 1979)

Description:  Seven (7) digit serial number that begins with a letter and ends with six (6) numerical digits.
Month of manufacture is the first letter digit.  (See Chart Below).
Year of manufacture is the second digit.  (See Chart Below).

Style 5:  6######  (Used prior to 1970)

Description:  Seven (7) digit all numerical serial number.
Year of manufacture is the 1st digit of the serial number.

Page last updated: 13 April 2016

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