Unit model number (including any dash numbers) and serial number must always be used when referring a problem to Lennox in regard to repair parts, literature, wiring diagrams, etc. Trane® has utilized multiple serial number formats over the years. The next two numbes are the week it was manuactured After 2002 Example, My Trane Heat Pump, Model No. If you are an HVAC tech, use this app to make sure your replacement equipment meets the standard requirement.
Start with Serial Number: 5188C01049 51 - The first two digits is Div or Division. The horizontal or vertical orientation and flow direction of the furnace may also impact the location of the information, but it is present somewhere on every Lennox unit. For an HB Smith boiler the age is typically the two digits following the letter at the beginning of the serial number.
