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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

What if you already missed the registration window?

You still have coverage, just the shorter base term rather than the extended one, so don't write the warranty off. Three things worth doing anyway: register now regardless (some manufacturers accept late registrations or honor them at their discretion, and it costs nothing to try); check whether your state exempts you (California and Quebec, among others, prohibit registration requirements, so the full term applies automatically there no matter when you register); and confirm your installer didn't already register it, dealers often do, and an unregistered-looking system may already be covered. If a major component fails inside what would have been the registered term, it can still be worth asking the manufacturer, in writing, whether they'll honor the extended coverage; goodwill exceptions happen more than people expect.

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.