Mitsubishi® HVAC age

How to determine the date of production/manufacture or age of Mitsubishi® brand HVAC Systems.

The industry average service design life for most forced air furnaces is 15-20 years, and the industry average service design life for most air conditioning condensing units is 10-15 years. The average service design life of boilers can vary from as little as 10 years to as many as 50 years depending on the type and quality of materials used in their manufacture. Routine upkeep/maintenance, regional weather/climate, and location/placement of the mechanical systems will all play critical roles in the longevity of these systems.

Parent Company: Mitsubishi

Subsidiaries or other related brands: None known at this time

The date of production/manufacture or age of Mitsubishi brand HVAC equipment can sometimes be determined from the serial number located on the rating data plate.

Various serial number styles/formats have been encountered. The two styles we have listed will code the year of manufacture in the first digit. The decade must be assumed based on nearest ANSI code date or condition of the unit.

IF your serial number is not represented in our sample styles, you MUST contact the manufacturer for further assistance in determining the age of the unit!!!

Example serial number styles/formats found:

Style 1: 89D00488D -or- 8XD00488D
Style 2: 8001637 T

Legend: Year is RED; Month is GREEN; Week is BLUE

Style 1: 89D00488D -or- 8XD00488D

Year (fiscal) of manufacture can be determined by using the 1st numerical digit.

The decade must be assumed based on nearest ANSI code date, condition of the unit, and/or refrigerant type used.

The 2nd character represents month of manufacture. (Jan. thru Sept. represented by 1-9; Oct., Nov., Dec. represented by X, Y, Z respectively)

CAUTION: The second position of this serial number can be a number OR letter.

In this example, the unit was manufactured the 9th month of either 2008 or 2018

ADDITIONAL NOTES:

For this Mitsubishi style, the 2nd character of the serial number represents the month of manufacture. Numbers represent months 1 thru 9 while letters X, Y, Z will represent months 10 thru 12 respectively.

Information obtained from the manufacturer indicates Mitsubishi production fiscal year begins in April (4th month) and ends the following March (3rd month). As such, units manufactured during months 1 thru 3 will be designated under the previous year code in the serial number, but may have a differing build date indicating the actual year.

See Image below: which illustrates actual manufacture date of January 2006, but shows the fiscal production date of 2005 by the serial number. January 2006 remains in their fiscal year of 2005 (April 2005 thru March of 2006)

Style 1: 8001637 T

Year of manufacture can be determined using the first digit of the serial number which indicates the last digit of the production year.

CAUTION: This style is for units with serial numbers ending with the letter "T" ONLY.

The decade must be assumed based on nearest ANSI code date, condition of the unit, and/or refrigerant type used.

Mitsubishi® History¹

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Every effort is undertaken to offer you correct and concise information to assist you in determining the age or manufacture date of HVAC/R equipment. Users relying on this information do so at their own risk.

Page last updated: 11/03/2023

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