AC warranty guide

Lennox AC Warranty: What’s Covered and How to Check Yours

Lennox’s basic limited warranty on a home AC covers parts only: 5 years on Merit and Elite series equipment and 10 years on the Dave Lennox Signature Collection. In Florida, eligible equipment automatically gets Lennox’s default extended limited warranty without registration, for 10 years of parts coverage in total on Merit and Elite and 12 years on the Signature Collection.

Sources: Lennox Warranty FAQs; Lennox Extended Limited Warranty, Merit and Elite series (PDF); Lennox Extended Limited Warranty, Dave Lennox Signature Collection (PDF); Lennox Product Registration

Last reviewed September 28, 2026 · Reviewed by the Right Away Home Services service team

How to check yours

Have the model number, serial number and installation date ready, then look the unit up with Lennox.

Look up a Lennox warranty Register a Lennox product

Lennox’s online warranty lookup takes the serial number printed on the label on the equipment.
Source: Lennox Warranty Lookup
On a cooling system, the model and serial numbers are on the nameplate or sticker near the service panel.
Source: Lennox: How can I confirm the model and serial numbers for my cooling system?
To see extended coverage tied to your equipment, Lennox’s certificate lookup on the same page takes the serial or registration number and your last name.
Source: Lennox Warranty Lookup
Have the installation date ready: coverage starts on the day the equipment was originally installed (the closing date for a newly built home), and if that date can’t be verified it starts six months after the date of manufacture.
Source: Lennox Basic Limited Warranty, Merit series (installed after Feb. 8, 2022) (PDF)
Warranty claims go through a Lennox dealer rather than the homeowner, and the basic limited warranty asks for a claim within 45 days of the part failing.
Sources: Lennox Warranty FAQs; Lennox Basic Limited Warranty, Merit series (installed after Feb. 8, 2022) (PDF)

Registration and transfer

Florida homeowners don’t need to register: eligible Lennox equipment automatically comes with the default parts-only extended limited warranty.
Source: Lennox Product Registration
For equipment bought in Florida, Lennox’s extended warranty says not registering neither reduces the coverage nor shortens it.
Source: Lennox Extended Limited Warranty, Merit and Elite series (PDF)
The labor option is the one step with a deadline: to switch to it, contact Lennox within 60 days of installation (or of closing on a newly built home), in Florida too.
Source: Lennox Product Registration
Outside Florida and the other places Lennox lists, the extended warranty needs registration within 60 calendar days of installation.
Source: Lennox Product Registration
If you bought the house, the basic limited warranty transfers to you; the extended limited warranty is for the original owner only and isn’t transferable, except where the law prohibits that limit. Labor coverage, when it was chosen, transfers for the rest of its 3 years.
Sources: Lennox Warranty FAQs; Lennox Extended Limited Warranty, Merit and Elite series (PDF)

What’s covered and what isn’t

Covered

Merit and Elite series: 5 years of parts under the basic limited warranty, 10 years with the default extension.
Source: Lennox Product Registration
Dave Lennox Signature Collection: 10 years of parts under the basic limited warranty, 12 years with the default extension.
Source: Lennox Product Registration
The labor option instead gives 3 years of labor coverage, with 7 years of parts on Merit and Elite or 10 years of parts on the Signature Collection.
Source: Lennox Product Registration
Compressors: Lennox’s coverage chart lists 10 years for Merit and Elite and 12 years for the Signature Collection on the parts-only option.
Source: Lennox Warranty Lookup

Not covered

Labor: under the basic limited warranty the owner pays trip charges, labor and the costs of diagnostic calls and of removing or replacing the part.
Source: Lennox Basic Limited Warranty, Merit series (installed after Feb. 8, 2022) (PDF)
Refrigerant, refrigerant line sets, cabinets, wiring, fuses and air filters aren’t covered components.
Source: Lennox Basic Limited Warranty, Merit series (installed after Feb. 8, 2022) (PDF)
Damage from hurricanes, floods, wind or lightning, and from a corrosive atmosphere or contact with corrosive materials such as salt, is excluded.
Source: Lennox Basic Limited Warranty, Merit series (installed after Feb. 8, 2022) (PDF)

Keeping it valid

Keep it maintained: Lennox states that failure to maintain the equipment voids the basic limited warranty.
Source: Lennox Basic Limited Warranty, Merit series (installed after Feb. 8, 2022) (PDF)
Installation, maintenance and every repair must be done by a licensed HVAC contractor following Lennox’s instructions, with manufacturer-specified parts.
Source: Lennox Basic Limited Warranty, Merit series (installed after Feb. 8, 2022) (PDF)
The indoor and outdoor units must be an AHRI-matched system that meets Lennox’s specifications.
Source: Lennox Basic Limited Warranty, Merit series (installed after Feb. 8, 2022) (PDF)
Moving the equipment after it was first installed ends coverage under the basic limited warranty.
Source: Lennox Basic Limited Warranty, Merit series (installed after Feb. 8, 2022) (PDF)

Next step

Keep your AC maintained so the warranty stays valid: find your local Right Away Home Services company

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Common questions

Does the Lennox warranty cover labor?

Not by default. Lennox’s factory warranty covers parts only. The labor option trades part of the extension for 3 years of labor coverage, and you have to choose it within 60 days of installation.

Sources: Lennox Warranty FAQs; Lennox Product Registration

Do I need to register my Lennox AC in Florida?

No. Lennox says eligible equipment in Florida automatically comes with the default parts-only extended limited warranty. You only need to contact Lennox, within 60 days of installation, if you want the labor option instead.

Source: Lennox Product Registration

Is a Lennox warranty still good after I buy the house?

The basic limited warranty transfers to later owners. Lennox says the extended limited warranty is for the original owner only and isn’t transferable, except where the law prohibits that limit.

Source: Lennox Warranty FAQs

Who files a Lennox warranty claim?

A Lennox dealer. Lennox says claims are submitted by a dealer, not by the homeowner, and the basic limited warranty asks for the claim within 45 days of the part failing.

Sources: Lennox Warranty FAQs; Lennox Basic Limited Warranty, Merit series (installed after Feb. 8, 2022) (PDF)

Sources and review

This guide summarizes Lennox’s own documents. The warranty certificate for your unit sets your coverage.