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How Old Is My Carrier Air Conditioner or Furnace?

Your Carrier unit's age is encoded in its serial number. Here is exactly how to decode it or use our free tool.

Where to find the Carrier serial number

On an air conditioner or heat pump, look for the data plate on the side or rear of the outdoor unit. On a furnace, open the upper front door — the plate is inside the cabinet.

How to decode a Carrier serial number

Format: Week-Year (WWYY)

1. Find the serial number on the data plate.
2. Read the first two digits = the week (01–53).
3. Read the next two digits = the year.

Bryant and Payne use the same format.

What your unit's age means

Typical lifespan for residential HVAC is 15–20 years. Under 10 years: repair with an OEM part. 10–15 years: repairs usually still win. Past 15 years: compare repair vs replacement.

R-22 warning: if your Carrier AC or heat pump was manufactured before 2010, it likely runs phased-out R-22 refrigerant.

Frequently asked questions