Daikin furnace and AC age by serial number
This Daikin serial number lookup covers Daikin furnaces, air conditioners and heat pumps built in the US with an all-digit serial number. On those units the first four digits give the Daikin manufacture date as a year and month.
Where do I find the serial number?
Daikin furnaces and air handlers carry the plate inside the cabinet, behind the access door. On outdoor Daikin units, look on the back or side panel.
How to read a Daikin serial number
A US-built Daikin ducted unit has a serial of nine or ten digits. Read the first pair as the year and the second pair as the month. If your Daikin serial contains letters, it is probably a ductless or commercial unit, which uses a different format.
What this covers
Covers Daikin-branded residential units built by Goodman in the US. Daikin ductless and commercial units use other formats that are not in this pack yet.
- Used
- 1980s to present
- Format
- Year, month, sequence (all digits)
- Example
- 1609123456
Example, read
Nine-digit and ten-digit serials both start with the year and month.
Some websites read these four digits as week and year. The better sources agree they are year, then month.
Where to find the serial number
Daikin furnaces and air handlers carry the plate inside the cabinet, behind the access door. On outdoor Daikin units, look on the back or side panel.
Brands with the same format
Questions
Which Daikin units does this decoder cover?
Ducted Daikin units with an all-digit serial, built in the US. Ductless mini splits and commercial Daikin systems use other formats that are not in our rules yet.
How old is my Daikin furnace or AC?
A serial such as 1605123456 was made in May 2016. The 16 is the year and the 05 is the month.
My Daikin serial has letters in it. What now?
That points to a format we do not decode yet. Check the label for a printed manufacture date, which is the most reliable answer anyway.
Does Daikin use the same serial format as Goodman?
For these US-built ducted units, yes. Daikin, Goodman and Amana units in this group all use the year-and-month format.
Why would a Daikin serial fail to decode?
Either the month digits are outside 01 to 12, the serial has the wrong number of digits, or it comes from a format we do not cover. Check the digits against the plate first.
Can I look up a Daikin model number here?
No. The Daikin model number describes the unit's type and capacity. For the build date, use the serial number in the decoder above.