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How Old Is My American Standard Air Conditioner or Furnace?

Your American Standard 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 American Standard 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 American Standard serial number

Format: Three eras (same as Trane)

1. 2010+: first two digits = year, next two = week. 1623 = week 23 of 2016.
2. 2002–2009: first digit = year (2–9), next two = week. 752 = week 52 of 2007.
3. 1983–2001: first letter = year code, next two = week.

Trane and American Standard are the same manufacturer.

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 American Standard AC or heat pump was manufactured before 2010, it likely runs phased-out R-22 refrigerant.

Frequently asked questions