You can also purchase additional labor coverage through the Comfort Shield program, which is provided by Service Net Warranty, LLC, part of AIG, and is transferable. To learn more about your Aire-Flo product warranty coverage, click on one of the questions below. WARRANTY YOUR WAYLENNOX PRODUCT REGISTRATION PORTAL. Year of manufacture is 7th-8th numerical digits. Lennox/Armstrong/Concord and Ducane WHP1-261-1 Parts. Please enter your installing dealer's phone (###-###-####). Example serial number styles/formats found: As you know, the Lennox factory warranty may cover parts for up to 10 years. Discover how your Lennox warranty helps protect your investment and provides peace of mind. The series of letters and digits in the Lennox model number reflects particular information relating to the product. WARRANTY IS AVAILABLE TO AUSTRALIA & NEW ZEALAND CUSTOMERS ONLY. There are 2 near you. 5604G#### to 5610L##### ## # . Step 1 Sign in to your LennoxPros.com account. Warranties: All parts have a one year warranty for defects unless stated otherwise. In total, Lennox has used 4 different styles of serial numbers on their furnaces, boilers, heat pumps, air handlers, AC units, and mini-splits. The first 2 numbers represent the factory where they were manufactured, the second 2 numbers are the year and the letter is the month where A is January, B is February, etc. Lennox Comprehensive Product Warranty for Commercial Applications