General Electric (GE)®
How to determine the date of production/manufacture or age of GE® HVAC Systems.
The date of production/manufacture or age of a GE® HVAC unit can be determined from the serial number.
If the central heating or cooling system in question truly bears the name "General Electric®" (GE®) then it can be assumed as very old and has exceeded the estimated useful service life. General Electric® is no longer manufacturing central heating and cooling systems. They sold this division to Trane in 1982. Most "newer" systems (after mid '80s and should they happen to have a GE® nameplate) will utilize Trane style numbering systems. This page is not intended and should not be used to determine the manufacture date of other GE® appliances such as window air conditioners, dehumidifiers, or other such appliances.
When GE® was manufacturing their own central heating and cooling systems, they utilized different numbering and letter formats over the years. The common style was strictly a numeric serial number typically comprised of 9 digits. The last 3 digits represent the manufacturing date.
The next two (and less common) styles used letter formats in the first OR last 2 serial number places. When used, the letters designated month and year of manufacture. See charts in the style samples below.
See also Trane® for a variety of serial number styles that may be used.