Appliage uses this WWYY structure for dates from 1985 onward. The Carrier serial number alone is enough to return the production week and an estimated age, so the model number is optional.
Carrier Serial Number Lookup
- 1–2 production week
- 3–4 year
- 5 plant marker
- remainder unit sequence
Positions 1–2 are the production week and must be from 01 through 53. Positions 3–4 are the last two digits of the year. Appliage uses this structure only for dates from 1985 through the present, so 14 means 2014. Position 5 is the plant letter assigned to the factory that made the equipment. The remaining digits are the unit sequence. The plant letter tells Carrier where the equipment was made, while the sequence identifies the individual unit. Neither field influences its manufacture date.
Carrier Serial Numbers Appliage Cannot Find the Age
A serial number that begins with a letter, contains a week above 53, or is too short does not match this Carrier layout. Appliage returns no date instead of applying the numeric rule to an older format.
The 1985 start is where the evidence stops, not necessarily when the format began. Real rating plates verify this numeric style back to 1985, including a field plate from week 28 of 1985. Nothing from 1980 through 1984 has passed verification, so a serial that lands in those years gets no date.
The decoded week is the manufacture date, not the installation date or the date the warranty started. A unit made in 2014 may have been installed and registered later.
Bryant, Payne, and Day & Night
Bryant and Payne use the same serial number structure. Select the brand printed on the rating plate so the result shows the correct equipment name.
Day & Night now belongs to the International Comfort Products family, whose serial numbers begin with a plant letter before the year and week. If the rating plate says Day & Night, select Day & Night in Appliage.
Sources
- CPSC: Carrier rooftop HVAC recall (18-731). The affected serial prefixes run from 1214P to 3317P, with manufacture dates from 2014 to 2017. Archived copy.
- Carrier warranty lookup. You can find label locations and search by serial number. Archived copy.
- CPSC: Carrier and Bryant air conditioner recall (17-094)
- CPSC: Carrier and Bryant air conditioner recall (08-073)
For other brands, see our appliance serial number lookup.
