How to Decode York Serial Numbers
Step-by-step guide to decoding any York HVAC serial number. Learn the Year-Letter-Week (Y+L+WW) format, what each digit means, and get instant results with our free decoder tool.
Step 1: Locate the York Label
Find the data plate on your York unit. It's usually on the side panel (outdoor units) or inside the cabinet door (indoor units). The label contains both the model number and serial number.
Step 2: Identify the Serial Number Format
York uses a Year-Letter-Week (Y+L+WW) serial number format. Do not confuse the serial number with the model number -- the serial is unique to each unit, while the model identifies the product line.
Step 3: Enter in the Decoder
Type your York model or serial number into HVAC Decoder Pro. Our decoder instantly parses York's encoding format and extracts manufacturing date, capacity, refrigerant type, and SEER rating.
Step 4: Review Your Results
The decoder displays a complete profile: manufacturing date, tonnage, BTU capacity, refrigerant type with phase-out status, SEER rating, and a color-coded condition indicator (Green = Good, Yellow = Aging, Red = Replace Soon).
York Serial Number Format Reference
Format
Year-Letter-Week (Y+L+WW)
Example Serial
W1G3412345
York serial numbers encode the manufacturing date, production facility, and unit sequence number. Our decoder handles all known York serial number formats automatically.
What Your York Serial Number Reveals
| Pos. | Field | Value | Meaning |
|---|---|---|---|
| 1 | Year code letter | W | 2005 (letter code) |
| 2 | Plant code | 1 | Wichita, KS plant |
| 3 | Month code letter | G | July |
| 4-5 | Week of manufacture | 34 | Week 34 |
| 6-10 | Sequential number | 12345 | Production sequence |
FAQ
Where is the serial number on a York unit?
On the metal data plate -- side/back panel for outdoor units, inside the cabinet door for indoor units.
How do I read a York serial number?
York uses Year-Letter-Week (Y+L+WW) format. Example: "W1G3412345". Our decoder parses it automatically.
How old is my York HVAC unit?
Enter your serial number in our decoder -- the manufacturing date is encoded in the Year-Letter-Week (Y+L+WW) format.