How old is my Mitsubishi Electric Trane mini split?

Serial number age decoder for Mitsubishi Electric Trane mini splits: 2 format eras, the decode rule in plain English, transcribed tables, and the official lookup.

• Mitsubishi Electric Trane 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 Trane 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.

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)

Example: serial 89D00488D decodes to 1958 or 1968 or 1978 or 1988 or 1998 or 2008 or 2018 (September).

Listed under Mitsubishi Electric in the source; Mitsubishi Electric Trane is named in that format's family and the corporate link is an estimate, not a checked fact.

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.

Listed under Mitsubishi Electric in the source; Mitsubishi Electric Trane is named in that format's family and the corporate link is an estimate, not a checked fact.

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.

What we could not confirm

• Mitsubishi Electric Trane is treated as sharing Mitsubishi Electric's format because the source lists it in that family; the corporate relationship itself is an estimate.
• No official online lookup URL was verified for Mitsubishi Electric Trane.

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

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