The first letter of the trane serial number lookup gives the year of manufacture and the next two numbers are the week.
Trane gas furnace age serial number.
Each letter corresponds to a different year so you must be familiar with how to interpret the trane furnace date code.
Saturday june 23 2018.
Models that range from the year 1983 to 2001 are coded with a letter.
In 2002 they started their serial numbers with the year it was built.
There are two serial number formats.
This style appears to be the early beginnings of style 2 format above.
In 2002 the first character of the serial number is 2 in 2003 3 and so on.
1 2002 to present if the serial number is a 9 digit combination of letters and numbers that starts with a number then the first number is the year.
See the small chart below.
Beginning in 2010 the first two digits are the year.
A serial number that starts with a letter is a clear sign that your unit is at least nineteen years old.
This trane serial number style was used from 1980 through 1982.
Depending on the product type the letter may be the first or last character of the serial number.