Daikin serial age
Manufacture date from the rating-plate serial. Same family as Goodman, McQuay. A printed MFR date on the plate still wins.
Daikin
Type the serial off the rating plate. Spaces and hyphens are ignored. Manufacture date is not the install date.
Diagnose this call
Age is open. The walkthrough is the seat.
Where the plate is
US splits and packaged units from Goodman plants: indoor vestibule / outdoor service-valve panel. Mini-splits: side of the outdoor chassis.
Styles
US Comfort (post-2012 Goodman plants)
1602393269
Ten-digit numeric uses the Goodman year/month read. 1602… = February 2016.
Some applied / older
FBOU0905048200
After a four-letter prefix, year is characters 5–6 and month is 7–8.
Mini-split / applied
Daikin has used a dozen other styles (letter years, four-digit year codes that are not calendar years). If the decoder misses, read the printed MFG DATE first, then the Building Intelligence Center Daikin page.
Cross-checked against Daikin HVAC age. FieldBench does not host or republish that page. Letter charts we could not verify are linked out instead of invented.