How old is my Mitsubishi Electric mini split?
Serial number age decoder for Mitsubishi Electric mini splits: 2 format eras, the decode rule in plain English, transcribed tables, and the official lookup.
Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.
Format example: 89D00488D
- Mitsubishi Electric mini split serial numbers in the era not stated format encode the year as position 1 = last digit of Mitsubishi FISCAL year (Apr-Mar); decade must be assumed (89D... = 2008 or 2018) and the position 2 = month: 1-9 = Jan-Sep, X = Oct, Y = Nov, Z = Dec (can be a digit OR a letter) (source: building-center.org).
- Example: serial 89D00488D decodes to 1958 or 1968 or 1978 or 1988 or 1998 or 2008 or 2018 (September).
- The era not stated format is ambiguous: Single year digit repeats every decade. Fiscal year runs April-March, so units built Jan-Mar carry the PREVIOUS year's digit (building-center example: plate date Jan 2006, serial year digit 5). Example 8XD00488D = Oct 2008/2018.
- Mitsubishi Electric mini split serial numbers in the era not stated format encode the year as position 1 = last digit of year; decade must be assumed (2008 or 2018) and the not encoded (source: building-center.org).
- Example: serial 8001637 T decodes to 1958 or 1968 or 1978 or 1988 or 1998 or 2008 or 2018.
- The era not stated format is ambiguous: Only for serials ENDING in T. No month. Decade ambiguous.
- Mitsubishi Electric's official lookup at mitsubishicomfort.com returns warranty / registration lookup.
Format eras
- era not stated VERIFIED
##A#####Aposition 1 = last digit of Mitsubishi FISCAL year (Apr-Mar); decade must be assumed (89D.. - era not stated VERIFIED
####### Aposition 1 = last digit of year; decade must be assumed (2008 or 2018)
How to read the serial
era not stated formatVERIFIED
Shape ##A#####A · example 89D00488D · confidence medium
- Year
- position 1 = last digit of Mitsubishi FISCAL year (Apr-Mar); decade must be assumed (89D... = 2008 or 2018)
- Week or month
- position 2 = month: 1-9 = Jan-Sep, X = Oct, Y = Nov, Z = Dec (can be a digit OR a letter)
| Month code | Month |
|---|---|
| 1 | January |
| 2 | February |
| 3 | March |
| 4 | April |
| 5 | May |
| 6 | June |
| 7 | July |
| 8 | August |
| 9 | September |
| X | October |
| Y | November |
| Z | December |
Example: serial 89D00488D decodes to 1958 or 1968 or 1978 or 1988 or 1998 or 2008 or 2018 (September).
era not stated formatVERIFIED
Shape ####### A · example 8001637 T · confidence medium
- Year
- position 1 = last digit of year; decade must be assumed (2008 or 2018)
- Week or month
- not encoded
- Plant
- trailing T = country of origin (Thailand)
Example: serial 8001637 T decodes to 1958 or 1968 or 1978 or 1988 or 1998 or 2008 or 2018.
Where the data plate is on a mini split
Two plates: one on the side of the outdoor unit, one on the indoor head (lift the front cover or look under the unit). The two serials differ; decode the outdoor unit for the system age.
General guidance, not brand-specific: the owner's manual or the installer can point to the exact spot. See the data plate guide.
Open the official Mitsubishi Electric lookup takes serial number; returns warranty / registration lookup; URL verified live
This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.
What we could not confirm
- Two styles, both put ONLY the last digit of the (fiscal) year in position 1; decade must be inferred (ANSI date, refrigerant, condition). mitsubishicomfort.com/warranties returned 200 (warranty terms; a serial-based lookup was not confirmed - registration is at /register-your-product, 200). Old /warranty, /warranty-lookup, /support all 404.
Sources
- https://www.building-center.org/mitsubishi-hvac-age/
- img: MITSUBISHI-Serial-Number-Style-1-NEW-1-1.jpg (transcribed)
- img: MITSUBISHI-Serial-Number-Style-2-NEW-1.jpg
- https://www.mitsubishicomfort.com/warrantiesofficial