Trane · American Standard · 4-Digit YYWW Date Code
Trane Serial Number Age Lookup
Find your Trane furnace or AC manufacture date.
Trane and American Standard encode the production year and week into the first four numeric digits of modern serial numbers. Enter your serial number below for instant informational decoding.
Trane Date Code Decoder
Enter your Trane serial number.
Locate the rating plate on your Trane or American Standard furnace, outdoor AC condenser, or heat pump to decode its production week and year.
Enter your Trane serial number above
Type the serial number from your equipment rating plate to decode the production week, manufacture year, and estimated age.
How Trane Encodes Age in Serial Numbers
Trane residential HVAC equipment uses distinct coding formulas depending on whether the unit was manufactured before or after 2010:
Modern Format (Post-2010): Serial Number 2204A12345
- Digits 1 & 2 (
22): Manufacture year = 2022. - Digits 3 & 4 (
04): Production week = Week 04 (late January). - Remaining Characters (
A12345): Factory plant code and sequence number.
Older Format (Pre-2010, 9-digit format): Serial Number 3242...
- 1st Digit (
3): Decade year digit = 2003 (or 1993). - 2nd & 3rd Digits (
24): Calendar week of production = Week 24.
Where to Find the Serial Tag on Trane HVAC Units
Trane Gas Furnaces
Turn off power, remove the upper burner access door, and locate the rating sticker on the inner left or right metal cabinet sidewall near the gas valve.
Trane AC Condensers & Heat Pumps
Affixed on the exterior metallic cabinet near the copper line connections or service panel access door.
Trane Air Handlers
Printed on the front service access panel or on the interior cabinet wall next to the evaporator coil.
Plain Text Manufacture Date
Many newer Trane units also print the plain-text manufacture date (e.g. 'MFG DATE: 01/2022') in the upper right corner of the rating label.
Frequently Asked Questions
How do I decode a Trane serial number to find the age?
On modern Trane and American Standard units manufactured from 2010 onwards, the first four numeric digits indicate the year and week of manufacture (YYWW). For example, a serial starting with 2204 was manufactured in the 4th week of 2022. On older units built before 2010, the first digit represents the year of the decade (e.g., 3 for 2003 or 1993).
Does this serial decoder work for American Standard HVAC?
Yes. Trane and American Standard are built by the same parent company (Trane Technologies) on shared assembly lines and use identical serial numbering and date-coding conventions.
Where is the serial number located on a Trane air conditioner?
On outdoor Trane air conditioners and heat pumps, look on the back or side exterior metal panel near the copper refrigerant line connections and electrical service disconnect box.
Disclaimer: This HVAC serial lookup tool provides an informational estimate based on Trane Technologies date-coding documentation and third-party industry records compiled by the Building Intelligence Center. Because Trane has used multiple serial styles across different production decades, treat every result as an estimate. Never attempt gas valve, heat exchanger, or high-voltage electrical repairs yourself; always consult a licensed HVAC contractor.