Carrier HVAC Age Lookup Tool
Decode your Carrier serial number to find the manufacturing date, system age, and maintenance recommendations. Free and instant. No account needed.
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Finding Your Carrier 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 Carrier HVAC Systems
Owned by Carrier Global
Willis Carrier invented modern air conditioning in 1902. The company he founded in 1915 is now the largest HVAC manufacturer in the world. Carrier makes central air conditioners, heat pumps, furnaces, and air handlers for both homes and commercial buildings, with manufacturing spread across several US facilities and some overseas assembly.
The serial number puts the manufacture date right at the front: four characters encoding the week number followed by the two-digit year. A unit built in week 50 of 2019 starts with 5019. If your Carrier is past 15 years old, it's worth talking to a contractor about what replacement would cost. Compressor failures on older units tend to arrive without warning.
Common Carrier HVAC Models & Series
The most-installed Carrier residential systems on the market today, organized by tier. Knowing your series helps narrow down service parts and warranty terms.
| Series | Type | Tier | Efficiency | Notes |
|---|---|---|---|---|
| Infinity 26 (24VNA6) | Air Conditioner | Premium | Up to 26 SEER2 | Variable-speed compressor; pairs with Infinity Touch thermostat for full modulation. |
| Infinity 24 Heat Pump (25VNA4) | Heat Pump | Premium | Up to 24 SEER2 / 13 HSPF2 | Greenspeed inverter compressor; performs down to about 0°F. |
| Performance 17 (24ACC7) | Air Conditioner | Mid-range | Up to 17 SEER2 | Two-stage scroll compressor; common upgrade pick for replacement jobs. |
| Comfort 16 (24ABC6) | Air Conditioner | Entry | Up to 16 SEER2 | Single-stage scroll compressor; the workhorse builder model. |
| Infinity 98 (59MN7) | Gas Furnace | Premium | Up to 98.5 AFUE | Modulating gas valve, variable-speed ECM blower. |
| Performance 96 (59TN6) | Gas Furnace | Mid-range | Up to 96.7 AFUE | Two-stage gas valve, variable-speed blower. |
How to Read a Carrier Model Number
Example
24ACC636A003
- 24Product family (24 = single-stage AC, 25 = heat pump)
- ACCSeries (ACC = Comfort 16, ACB = Comfort 14, VNA = Infinity)
- 6SEER tier (6 ≈ 16 SEER, 7 ≈ 17 SEER)
- 36Nominal capacity in thousands of BTU (36 = 36,000 BTU = 3 tons)
- A003Voltage and minor revision code
Divide the BTU portion by 12,000 to get the tonnage. Common values: 18=1.5t, 24=2t, 30=2.5t, 36=3t, 42=3.5t, 48=4t, 60=5t.
Carrier HVAC Quick Facts
Warranty
Carrier's residential equipment carries a 10-year parts warranty when registered within 90 days of installation; unregistered units fall back to 5 years. The compressor on Infinity- and Performance-series units typically gets a separate 10-year warranty.
Expected Lifespan
AC / Heat pumps: 15 to 20 years
Furnaces: 18 to 25 years
Where It's Built
Indianapolis, Indiana (Carrier's Lewis S. Hyatt residential plant) for most US-market AC and heat pumps; furnaces are built in Tyler, Texas and Collierville, Tennessee.
Price Positioning
Premium tier — Carrier-branded equipment typically costs 15-25% more than equivalent Bryant or Payne (its sibling brands).
Known Carrier Issues to Watch For
A short list of patterns reported on Carrier equipment. Most have been addressed with revised designs or service bulletins, but they're useful context if you're diagnosing an older system.
- •Some 2010-2014 Infinity series condensers had Copeland Scroll compressor recalls related to early oil-pump failures; Carrier covered most under the original parts warranty.
- •The proprietary Infinity Touch communicating thermostat will not work with non-Carrier indoor units, so a furnace failure can force replacement of the thermostat too.
- •Aluminum micro-channel coils used on 2012+ outdoor units are more leak-prone than older copper coils when installed in coastal or industrial environments.
Carrier HVAC FAQs
Related HVAC Brands
Carrier shares a parent company with these brands -- they often use similar serial number formats and components.
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