York HVAC Age Lookup by Serial Number
Decode your York serial number to find the manufacturing date, system age, and maintenance recommendations. Free and instant. No account needed.
Finding Your York Serial Number
Check these four spots on your HVAC system
Common Locations
What to Look For
- White or metallic manufacturer sticker
- Labeled "Serial No." or "S/N"
- Typically 8–12 characters long
- Usually near the model number
Can't find it? Try the electrical access panel on the front of the outdoor unit or inside the air handler cabinet.
Serial Number Examples
Don't worry if yours looks different — each brand has multiple formats and our system can decode most variations.
About York HVAC Systems
York has been making HVAC equipment since 1874. The brand and the Pennsylvania city it's named after have been linked from the beginning. Johnson Controls acquired York in 2005 and runs it as a separate brand. York makes a wide range of residential and commercial heating and cooling equipment, from small split systems all the way to large commercial chillers. The serial number uses a letter-based date code in the first two positions, where each letter maps to a specific year or month depending on the encoding table used by that generation of equipment.
Supported Brands
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