This will state a date of when the furnace was last serviced. The easiest way to track the age of a Trane furnace is to look for the serial number. right on thru. Year of make indicated by 3rd letter in the serial number. Doesn’t match anything on this page. Is a furnace allowed in a bedroom, bathroom, or an adjoining closet? Good job, Dave.

Old Serial Number from 1971 – October, 2004 Old Serial Number format look like this: XBFM220710, EADM203490, and BKJM310394. Finding out when your furnace was last serviced is just as easy as finding the label of the manufacturer’s date or the serial number. What are the most common problems with wall/window air conditioners? 1980 = A. 1987 - T If the trane serial number is a 9-digit combination of letters and numbers that starts with a number, then the first number is the year. (The letter A in the Sample represents January). Example: RPGC-037JA = 3 ton, Age: Four digits of serial number indicate date of manufacture where first two indicate the week and the third and fourth are the year. Tappan: Age is the last 3 characters (digits and letter) of the serial number for the year and month of manufacturer. E=90 J = September Open or pull off the door and look at the interior metal of the door. L = September B=87 Does an old air conditioner use more electricity as it ages?
W0E4298223, N0D6941103, and A0E5219381. So the serial number of a Luxaire furnace shown below, which has a “J” as the third letter was manufactured in with 1979 or 2000.

2000 - J

A = January 1997 - F 1976 - F Can anybody tell me the date of manufacture.

80 = 1980 << How can I determine the age of an International Comfort Products (ICP) heat pump from the serial number? H = August What color should the flame be in a natural gas furnace? We look forward to helping you with your heating and air goals! 1975 = P 1971 - A 6th thru 11th digits represent the Unit Identity Number. http://www.bardhvac.com/digcat/S3364_TechDoc_CD/TechDoc-PDF/SerialNumberNomenclature.pdf, Powered by Discourse, best viewed with JavaScript enabled, http://www.bardhvac.com/digcat/S3364_TechDoc_CD/TechDoc-PDF/SerialNumberNomenclature.pdf. 1962 = B If your unit is newer or a specific brand that tends to list the manufacturer’s date, this will be on the label as well. Tappan: Age is the last 3 characters (digits and letter) of the serial number for the year and month of manufacturer. However, if you have an older furnace, you may need to use your detective skills. Is the energy efficiency of the furnace part of the SEER rating of a central air conditioning system? How can I find out the size of my air conditioner?

Parent: Ingersoll Rand. (The letter D in the Sample represents 1964). N = November L = November Don’t let the Digging around for the label, deciphering the mysterious code, and determining the age of your furnace deter you. Trane uses alpha codes in their serial numbers to determine year of manufacture. 1990 - X How did homes stay cool in Florida before air conditioning? Example: xxxx1872 = 18th week of 1972, More recently date of manufacture information is found closer to the middle of the serial number. According to Inspectapedia website, in the article, "How to Determine Furnace Age", serial numbers from furnaces made after the year 2000 are easier to decipher. Why has the thermostat screen gone blank? **BARD **1962 to March 1980 Sample Number 123456 A D 1st six digits are the Unit Identity Number. 1980 = V. 1st three digits are the Compressor Part Number. T=81(seventh digit) Notice that the year that the letter indicates is corroborated by the 1990 year of the ANSI rating above it, which should be the same year or just a few years earlier.

Example: xxxxx85C = March 1985. All Rights Reserved. B = February

M=97 June 1977 Can anyone help me date a Frigidaire model FS3BA, serial FS3000752901 ? Letter “I” was not used. 1992 – A E = May We want you to be safe during every step of the way when determining the age of your furnace.

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