First Alert warranty for smoke & CO alarms
The short version
First Alert covers smoke & CO alarms in full for 10 years, with no partial coverage after that. That full coverage is longer than most of the 4 brands we compared, which typically cover nothing in full. You don't need to register to get this coverage.
From First Alert'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: 10 yearsNo partial coverage
- Full coverageWhole alarm10 years
The fine print, decoded
What it leaves out
- Batteries
- Normal wear and tear
- Water damage
Good to know before you buy
- Covers the original buyer only. Keep your original sales receipt.
- Included batteries are not covered.
How other brands compare for smoke & CO alarms
Compare all 4 brandsWhere you buy it matters
How long stores give you to return it
Longest return window first, for smoke & CO alarms.
- CostcoMost itemsNo fixed deadline
- Lowe'sMost items90 days
- The Home DepotMost items90 days
- WalmartMost items90 days
- Ace HardwareMost items30 days
- Do it BestMost items30 days
Show all 7 stores
- Best BuyMost items15 days from delivery
From each store's published return policy, using its rule for smoke & CO alarms where it has one. Member and holiday extensions aren't counted. Check yours before you buy.
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