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Home > Serial Number Lookup > Carrier
Your Carrier unit’s age is encoded in its serial number. Here is exactly how to decode it — or use our free tool and get the answer instantly.
On an air conditioner or heat pump, look for the data plate (metal tag or foil sticker) on the side or rear of the outdoor unit. On a furnace, open the upper front door — the plate is inside the cabinet, often on the side wall or blower deck. Photograph the whole plate so you capture both the model and serial numbers.
Format: Week-Year (WWYY) - first 4 digits
| Serial starts with | Decoded manufacture date |
|---|---|
| 0118… | Week 1 of 2018 (early January 2018) |
| 3019… | Week 30 of 2019 (late July 2019) |
| 4006… | Week 40 of 2006 (October 2006) |
| 5220… | Week 52 of 2020 (December 2020) |
| 1294… | Week 12 of 1994 (March 1994) |
Years 00–26 decode to 2000–2026; higher 2-digit years decode to the 1900s. Very old units (pre-1980s) used letter year codes instead — email us a photo if yours does not match.
This same week-year format applies across the Carrier family: Carrier, Bryant, and Payne all use it on units made since roughly 1980.
Typical lifespan for residential HVAC is 15–20 years. Under 10 years: repair with an OEM part — replacement almost never makes sense. 10–15 years: repairs still usually win. Past 15 years: get the repair quote, then compare against replacement before deciding.
R-22 warning: if your Carrier AC or heat pump was manufactured before 2010, it likely runs phased-out R-22 refrigerant. Electrical repairs (capacitors, contactors, control boards) stay cheap — refrigerant work gets expensive fast.