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How old is my A.O. SMITH boiler?
Check the rating label of your A.O. SMITH boiler for the serial number and any printed manufacture date. Enter the details or a label photo to check supported date formats, typical service life and available recall notices.
Check your A.O. SMITH boiler
- Find the rating label: On the unit's rating plate label; check the product manual for its exact position.
- Take a photo of the whole label, or note the model and serial numbers.
- Check it on Appliance Age. It is free, and no account is needed.
Where is the serial number on a A.O. SMITH boiler?
On the unit's rating plate label; check the product manual for its exact position.
Keep the model, serial and any separate production code or printed date together. Not every serial number contains a publicly decodable date.
Checking the manufacture date
Use the format that belongs to this product family. A printed production date, a supported serial code or manufacturer confirmation can establish the age. Repeating year codes may leave more than one possible year; a model-series introduction date helps narrow the range but does not date your individual unit.
How long does a A.O. SMITH boiler last?
Boilers typically last 15 to 30 years. Use, water quality and maintenance matter more than the brand. Have it serviced yearly and watch the pressure gauge; frequent topping up points to a leak.
More about boilersENERGY STAR certified A.O. SMITH boilers
3 A.O. SMITH models are currently ENERGY STAR certified, 3 of them sold in Canada. The certified models went on the market between 2016 and 2016. An older A.O. SMITH boiler may use more energy than today's certified models.
Compare models on ENERGY STARSource: ENERGY STAR open data, 2026-10-08.
A.O. SMITH boiler parts
Parts that wear out most often on boilers:
- Circulator pump
- Expansion tank
- Pressure relief valve
- Igniter
Have the model number from the rating label ready so the parts fit.
A.O. SMITH official partsA.O. SMITH boiler recalls
Every A.O. SMITH check is compared with Health Canada, U.S. CPSC and U.S. NHTSA recall notices.
Search A.O. SMITH boiler recall noticesA. O. Smith’s recall pageQuestions
- How do I find out how old my A.O. SMITH boiler is?
- Find the rating label (On the unit's rating plate label; check the product manual for its exact position), then enter the serial number or a photo of the label on Appliance Age. It checks supported serial date codes or a printed date for you, free; some formats need more information.
- Where is the serial number on a A.O. SMITH boiler?
- On the unit's rating plate label; check the product manual for its exact position.
- Can I tell how old my A.O. SMITH boiler is by the model number?
- The model number tells you which model it is, not when your unit was made. Look for a manufacture date or a supported date code in the serial number, printed next to the model number on the same label.
- Can I decode a A.O. SMITH serial number myself?
- Some A.O. SMITH product families have serial date codes, while others need a printed date or manufacturer confirmation. Repeated year codes can produce multiple candidate years; the model and original documents help resolve them.
- How long does a A.O. SMITH boiler last?
- Boilers typically last 15 to 30 years with normal use and maintenance.
- Where can I get A.O. SMITH boiler parts?
- From A.O. SMITH's official parts store, or an appliance parts retailer. Have the model number from the rating label ready.
Other A.O. SMITH appliances
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