Lennox warranty for heating & cooling
The short version
Lennox doesn't cover everything, but keeps heat exchanger (80% furnaces) and compressor covered to 20 years. That full coverage is the same as most of the 25 brands we compared, which typically cover nothing in full. Some of this coverage only applies if you register the product.
From Lennox's published warranty, checked October 2026.
What's covered
Full coverage: everything, parts and laborPartial coverage: some parts only, you usually pay labor
Purchase5 yrs10 yrs+Full: NonePartial: to 20 years
- Partial coverageHeat exchanger (80% furnaces)20 years
- Partial coverageCompressor7 years
- Partial coverageOther parts7 years
- Partial coverageLabor (with registration)Only if you register3 years
Good to know before you buy
- Register your equipment: Lennox says registration activates its extended coverage.
- Claims must go through a Lennox dealer, usually the one who installed it, not directly to Lennox.
- Exact years depend on the product series; check the warranty certificate for your model.
How other brands compare for heating & cooling
- 1. Daikin60/100 · Full: 12 years
- 2. Carrier56/100 · Full: 3 years
- 3. Portacool45/100 · Full: None
- 4. Goodman40/100 · Full: None
- 5. Ruud40/100 · Full: None
Where you buy it matters
How long stores give you to return it
Longest return window first, for heating & cooling.
- CostcoMost itemsNo fixed deadline
- SupplyHouseMost items365 days
- WalmartMost items90 days
- Northern Tool + EquipmentMost items60 days from delivery
- Ace HardwareMost items30 days
- Do it BestMost items30 days
Show all 12 stores
- FergusonMost items30 days
- WayfairMost items30 days from delivery
- SutherlandsSouth Central storesMost items30 days
- Best BuyMost items15 days from delivery
- The Home DepotAir conditioners, dehumidifiers, pumps, portable evaporative coolers and portable heaters7 days
- Lowe'sAC units and evaporative coolers48 hours from delivery
From each store's published return policy, using its rule for heating & cooling where it has one. Member and holiday extensions aren't counted. Check yours before you buy.
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