You can find the model and serial numbers (M/N and S/N) for your furnace by removing the top-front service panel and looking to the left side of the interior cabinet or the top of the blower deck, depending on whether your system is an 80% or 90% AFUE unit.
How do you read a Lennox furnace serial number?
New Lennox serial numbers usually contain 4 numbers followed by a letter. The first 2 numbers stand for the factory location, the second 2 numbers are the year and the following letter is the month.
How can I tell how old my Lennox furnace is?
The date of production/manufacture or age of Lennox® HVAC equipment can be determined from the serial number located on the data plate.
Each unit manufactured is a duplication of a particular model. The model is identified by a "model number" which is stamped on the unit nameplate or rating plate. ... The sequence of letters and digits in the Lennox model number reflects specific information about the unit.
How do I read my furnace model number?
You can find the model and serial numbers (M/N and S/N) for your furnace by removing the top-front service panel and looking to the left side of the interior cabinet or the top of the blower deck, depending on whether your system is an 80% or 90% AFUE unit.