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Lennox Warranty Registration: How and When to Register

Registering your Lennox system within 60 days of installation unlocks the extended parts term, and lets you choose your "Warranty Your Way" coverage. Miss that window and your coverage drops to the shorter base term. Here's exactly how to do it and what you need.

How to register your Lennox warranty

1. Gather your information: the model and serial numbers for each component (on the data plate attached to each unit, and on your installation invoice), the installation date, and your installing dealer's details.
2. Go to the official Lennox registration page (linked below) and enter your details. Register each component if prompted.
3. Save the confirmation. Keep the registration confirmation with your proof of purchase, you'll need both if you ever file a claim.

→ Lennox official warranty registration page

Why it matters

Lennox's distinctive Warranty Your Way program lets you choose between extra parts coverage or a labor package (3-year labor / 2-year parts), a choice you make at registration. Registration isn't required in California, Florida, Georgia (for units installed on/after 1/1/26), and Quebec, where law prohibits it.

What you need to register

• Model number(s), on the unit data plate and installation invoice
• Serial number(s), same locations
• Installation date
• Installing dealer name/information

For full Lennox coverage terms and how to file a claim, see our Lennox warranty guide. Compare across brands in the best HVAC warranties guide.

Registration window and terms verified from Lennox documentation as of 2026 and subject to change. Confirm current requirements on Lennox's official site.