York Gas FurnaceHow to Decode
York, a Johnson Controls brand, has been manufacturing HVAC solutions for over 145 years with industry-leading efficiency.
Decode Your Unit NowYork Gas Furnace — Type
Brand
York
Equipment Type
Gas Furnace
SEER Range
80-98 AFUE
Expected Lifespan
15-30 years
Serial Format
Year-Letter-Week (Y+L+WW)
Warranty
10-year limited parts
Current Refrigerant
R-410A / R-32
Headquarters
Milwaukee, WI
York Serial Number Decoding Table
Example
W1G3412345
| Positions | 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 |
York Model Number Decoding Table
Example
YZF04811C
| Positions | Field | Value | Meaning |
|---|---|---|---|
| 1 | Brand | Y | York |
| 2-3 | Product type | ZF | Affinity series AC |
| 4-6 | Capacity (000s BTU) | 048 | 48,000 BTU (4 tons) |
| 7-8 | SEER rating | 11 | Efficiency class |
| 9 | Revision | C | Third revision |
York Gas Furnace -- Overview
York manufactures a comprehensive lineup of gas furnace models ranging from entry-level to premium high-efficiency units. With SEER ratings spanning 80-98 AFUE, York offers options for every budget. These units are backed by 10-year limited parts.
The typical lifespan is approximately 15-30 years with regular maintenance. Our decoder tool can instantly tell you the exact age and condition of your unit.
How to Decode Your York Gas Furnace Serial Number
Every York HVAC unit has a unique serial number that encodes critical information about the unit. York uses a Year-Letter-Week (Y+L+WW) format, where specific characters represent the manufacturing date, production facility, and unit sequence number.
For example, the serial number "W1G3412345" can be decoded as follows: the first characters indicate the manufacturing date, while subsequent digits identify the production line and unit number. Our free decoder tool automatically parses this format and reveals the complete manufacturing history.
Maintenance Schedule for York Gas Furnace
Replace or clean air filters: Every 1-3 months. Clean condenser coils: Annually (spring). Check refrigerant levels: Annually. Inspect electrical connections: Annually. Clean evaporator drain line: Every 6 months. Test thermostat calibration: Annually. Inspect ductwork for leaks: Every 2-3 years.
York Gas Furnace Efficiency Over Time
York has continuously improved efficiency to meet evolving federal standards. In 2006, the minimum was raised to SEER 13. In 2015, southern states moved to SEER 14. In 2023, new SEER2 standards took effect: 14.3 SEER2 (South), 13.4 SEER2 (North). Modern York models range from 14 to 26+ SEER.
Regarding refrigerants: York units before 2010 likely use R-22 (phased out since 2020 -- expensive and harmful). Units from 2010-2023 use R-410A. Newest models use R-32 or R-454B to meet EPA regulations. Knowing your refrigerant is critical -- R-22 refills cost $100-200+ per pound.
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Decode Your Unit NowFAQ
How do I find the age of my York HVAC unit?
Enter your York serial number into our free decoder. York uses a Year-Letter-Week (Y+L+WW) format. We parse it instantly and calculate the exact age, plus a condition status.
Is York a good HVAC brand?
York is one of the most established manufacturers, founded in 1874 with over 152 years of experience. They offer 10-year limited parts and consistently rank among top brands.
What does a York serial number look like?
York serial numbers follow a Year-Letter-Week (Y+L+WW) format. Example: "W1G3412345". Find it on the metal data plate on the unit.
How long is the York warranty?
York typically offers 10-year limited parts on residential equipment when properly registered.