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How old is my Mitsubishi Electric unit?

Mitsubishi Electric is part of Mitsubishi Electric. 2 serial formats sourced across mini split.

Serial number decoder for Mitsubishi Electric

Serial no.

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.

Decoder pages by product

Official lookup: the authority

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.

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.