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How old is my Daikin furnace or AC?

Type the serial number from the Daikin label to see when it was built. Daikin units are built by Daikin Comfort Technologies (formerly Goodman), for ducted units, so the serials follow that company's format.

Example

1610123456

16Year: 16 = 2016
10Month: 10 = October

Built October 2016

10 years old

Plenty of life left. Well inside the usual 15 to 25 year lifespan.

Keeping it going

Change or clean the air filter every 1 to 3 months. A clogged filter is the most common cause of strain.
Keep 2 feet of clear space around the outdoor unit and hose the fins off gently each spring.
A yearly tune-up catches small problems, like a weak capacitor, before they become a no-heat or no-cool call.
Some home insurers and home buyers’ inspectors ask the age of the HVAC system. Florida 4-point inspections record it.
Most HVAC parts warranties run 5 to 10 years and require registration within 60 to 90 days of install. Check with the installer.

How this was read

The first two digits, 16, are the year: 2016.
The next two digits, 10, are the month: October.
The last six digits are a running number.

Format: Goodman year and month. Sources: CPSC 2017 Goodman furnace recall (serials starting 1609 to 1612), CPSC 2013 Amana packaged unit recall (serials starting 1206 to 1210), CPSC 2014 Goodman and Amana PTAC recall, Building Intelligence Center: Goodman.

Reading a Daikin serial number

Daikin furnaces and ducted systems are built by Goodman and use its format: year, then month.

Daikin ductless mini-splits built in Japan or Thailand use other codes that the checker does not read. Many of their labels print the manufacture date.

About Daikin

Daikin Industries of Japan bought Goodman Global of Houston for $3.7 billion. The deal closed on November 1, 2012.
Daikin’s North American headquarters and main plant is the Daikin Texas Technology Park in Waller, Texas, near Houston. It opened in 2017.
Goodman took the name Daikin Comfort Technologies North America in April 2022.

Sources: Completion of the Goodman Acquisition, Daikin celebrates grand opening at new technology park, U.S. subsidiary Goodman renamed Daikin Comfort Technologies North America

Goodman year and month

Used about 1975 to today. Example: 1609123456

Goodman, Amana and Daikin ducted units have a 10-digit serial. The first two digits are the year and the next two are the month. 1609 means September 2016.

Worked example: 1610123456 was built October 2016, so it is 10 years old as of October 2026.

Sources: CPSC 2017 Goodman furnace recall (serials starting 1609 to 1612), CPSC 2013 Amana packaged unit recall (serials starting 1206 to 1210), CPSC 2014 Goodman and Amana PTAC recall, Building Intelligence Center: Goodman

Daikin recalls

Recalls from the U.S. Consumer Product Safety Commission that name Daikin. Whether a unit is included depends on its model and build date; the checker above flags matches.

Year	Recall	Hazard
2024	Daikin FIT, Amana S-series and Goodman SD heat pumps	After a power cut the unit can heat the house even when set to cool.
2024	Amana, Daikin and Goodman packaged units	Wrong electrical ratings on the plate can lead to wrong wiring and a fire.
2018	Goodman, Amana and Daikin modular blowers	Wrong electrical info on the label can lead to undersized wiring and a fire.
2017	Goodman, Amana and Daikin 80% gas furnaces	The blower motor is not grounded, which can shock someone working on it.

Standing at the unit? Use your phone

Point your phone’s camera at this code. The scanner opens and reads the label for you.

Same serial number format as Daikin: Amana, Goodman.

Formats on this page were last checked against their sources in October 2026. Daikin is a trademark of its owner. This page is independent and not affiliated with or endorsed by Daikin. For warranty questions, contact Daikin directly.

Where the serial is on a Daikin

On a furnace or air handler, remove the front door: the rating plate is on the inside wall of the cabinet. On an outdoor unit, look on the side of the cabinet near the electrical panel.

Turn off the furnace switch before removing the front door. The outdoor unit’s plate is usually on the side panel near the electrical connections, sometimes on the back.