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How Old Is My Goodman Air Conditioner or Furnace?

Your Goodman 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 Goodman 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 Goodman serial number

Format: Year-Month (YYMM)

1. Find the 10-digit all-numeric serial number.
2. First two digits = year.
3. Next two digits = month (01–12).

Amana and Daikin residential use the same YYMM 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 Goodman AC or heat pump was manufactured before 2010, it likely runs phased-out R-22 refrigerant.

Frequently asked questions