Lennox · Residential HVAC warranty
Lennox warranty lookup, serial formats and coverage terms.
Lennox lets you look up a warranty by serial number, or by registration number and last name. See what the serial looks like, what each series covers and why a homeowner cannot file the claim directly.
Run the lookup on Lennox
Open the Lennox warranty lookup
Lennox offers two searches: by serial number, or by serial or registration number plus last name to find your warranty certificate. Lennox notes the lookup covers equipment used in a residential application and, if nothing is found, tells you to contact your installing dealer or verify the serial number and try again.
What a Lennox serial number looks like
Lennox prints three example shapes on its lookup page, where # is a digit and A is a letter:
####A#####: four digits, one letter, five digits.A##A######: a letter, two digits, a letter, six digits.AA##A#####: two letters, two digits, a letter, five digits.
It lists registration numbers separately, and they are printed on the warranty certificate, not the equipment: ######, AAAAAA, #A#A#A and A#A#A#. The serial number itself is on a label affixed to the equipment; Lennox's page has separate heating and cooling guides to the label location. Lennox does not say on that page what the digits mean, so we do not infer a manufacture date from them.
Coverage by series
Lennox's extended limited warranty comparison shows two ways to take each series. Values are years unless stated:
| Series | Option | Compressor | Other parts | Labor |
|---|---|---|---|---|
| Dave Lennox Signature Collection | Parts only | 12 | 12 | 0 |
| Dave Lennox Signature Collection | With labor | 10 | 10 | 3 |
| Elite | Parts only | 10 | 10 | 0 |
| Elite | With labor | 10 | 7 | 3 |
| Merit | Parts only | 10 | 10 | 0 |
| Merit | With labor | 7 | 7 | 3 |
The heat exchanger line on the same table reads "80% - 20 | 90+ & Oil - Life" for every series, which we read as 20 years on 80% furnaces and a limited lifetime term on 90%+ and oil models. The "parts only" and "with labor" labels are ours: the Lennox table shows the two combinations side by side with "OR CHOOSE" between them, and its FAQ says registered owners can select up to 3 years of labor coverage.
What Lennox says about labor, claims and transfers
- Labor: the factory warranty covers parts only. With registration, owners can select up to 3 years of labor coverage. A Comfort Shield Extended Service Agreement can be bought up to five years after installation and is fully transferable if you sell your home.
- Claims: only a Lennox dealer can submit one, not the homeowner. Call your original installer or a local dealer, who diagnoses the problem, confirms coverage and handles the claim.
- Transfers: the Basic Limited Warranty transfers to later owners. The Extended Limited Warranty, except where prohibited by law, goes to the original owner only, though a labor portion can transfer.
Which certificate applies
Lennox publishes separate Basic and Extended Limited Warranty certificates (PDF) for products installed before February 8, 2022 and after it, by product family: boilers, commercial equipment, Signature Collection, Elite, Merit, indoor air quality, mini-splits, packaged units, thermostats and zone control panels, and, for installs after February 8, 2022, water heaters. Match the certificate to your install date, since the terms differ.
Worked example
A homeowner whose system was installed in July 2023 looks at the Lennox page. Because the install is after February 8, 2022, they choose the "installed after" certificate for their series. They run the serial number on the lookup to see the record. When the outdoor unit's compressor fails in year 6, they call the installing dealer: the dealer, not the homeowner, files the claim. If they had selected 3 years of labor coverage at registration, labor would have been covered only until year 3, so the year-6 labor bill is theirs unless they bought a Comfort Shield agreement.
What this page does not cover
- It does not decode a Lennox serial number into a manufacture date; Lennox does not publish that on the page we read.
- It does not show your individual record or status; the lookup does.
- Commercial equipment: Lennox notes its lookup is for residential use.
FAQ
How do I look up a Lennox warranty?
Use the warranty lookup on lennox.com. You can search by serial number, or by serial or registration number plus your last name to find the warranty certificate.
What does a Lennox serial number look like?
Lennox lists examples written with # for a digit and A for a letter: ####A#####, A##A###### and AA##A#####.
How long is the Lennox warranty?
It depends on the series and whether you chose labor coverage. For Signature Collection, Elite and Merit equipment, Lennox shows 7 to 12 years on compressors and 7 to 12 years on other parts, with up to 3 years of labor coverage as an option on registration.
Does the Lennox warranty cover labor?
The factory warranty covers parts only. With registration owners can select up to 3 years of labor coverage, and a Comfort Shield Extended Service Agreement can add more.
Can a homeowner file a Lennox warranty claim?
No. Lennox says claims must be submitted by a Lennox dealer, so contact your original installer or a local Lennox dealer.
Is the Lennox warranty transferable to a new homeowner?
The Basic Limited Warranty is. The Extended Limited Warranty goes to the original owner only except where the law says otherwise, although a labor portion can be transferable.
Sources
Retrieved 2026-11-01. Each link was opened and the figures on this page were checked against the text next to it.
- Lennox: Warranty Lookup: Serial and registration formats, lookup options, warranty certificate dates, coverage table and the warranty FAQs.
Not legal or financial advice
This page summarizes what the manufacturers publish on their own sites. Warranty terms differ by model, installation date and state, and the warranty certificate that came with your equipment controls. Confirm anything that matters with the manufacturer or your installing dealer. Nothing you do on this page is sent anywhere.