How old is my Crown boiler?
Serial number age decoder for Crown boilers: 2 format eras, the decode rule in plain English, transcribed tables, and the official lookup.
Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.
Format example: AI
- Crown boiler serial numbers in the 2004 to present format encode the year as Series letter 2 (table below) and the month as Series letter 1 (A=Jan..L=Dec, I=Sep) (source: building-center.org).
- Example: serial AI decodes to January 2012.
- Crown's official lookup at velocityboilerworks.com returns warranty / registration lookup.
Format eras
- 2004 to present VERIFIED
AASeries letter 2: A=2004 B=2005 C=2006 D=2007 E=2008 F=2009 G=2010 H=2011 I=2012 J=2013 K=2 - era not stated VERIFIED
#/##/####literal date in the Series field of the rating plate
How to read the serial
2004 to present formatVERIFIED
Shape AA · example AI · confidence high
- Year
- Series letter 2: A=2004 B=2005 C=2006 D=2007 E=2008 F=2009 G=2010 H=2011 I=2012 J=2013 K=2014 L=2015 M=2016 N=2017 O=2018 P=2019 Q=2020 R=2021 S=2022 T=2023 (chart rev 01/2023; extrapolate U=2024, V=2025 unverified)
- Week or month
- month = Series letter 1 (A=Jan..L=Dec, I=Sep)
| Year code | Year(s) |
|---|---|
| A | 2004 |
| B | 2005 |
| C | 2006 |
| D | 2007 |
| E | 2008 |
| F | 2009 |
| G | 2010 |
| H | 2011 |
| I | 2012 |
| J | 2013 |
| K | 2014 |
| L | 2015 |
| M | 2016 |
| N | 2017 |
| O | 2018 |
| P | 2019 |
| Q | 2020 |
| R | 2021 |
| S | 2022 |
| T | 2023 |
| U | 2024 |
| V | 2025 |
| Month code | Month |
|---|---|
| A | January |
| B | February |
| C | March |
| D | April |
| E | May |
| F | June |
| G | July |
| H | August |
| I | September |
| J | October |
| K | November |
| L | December |
Example: serial AI decodes to January 2012.
era not stated formatVERIFIED
Shape #/##/#### · example 3/18/2010 · confidence high
- Year
- literal date in the Series field of the rating plate
- Week or month
- literal
Where the data plate is on a boiler
On the jacket: a plate or sticker on the front or side of the boiler casing, sometimes behind a removable front panel next to the gas valve or control.
General guidance, not brand-specific: the owner's manual or the installer can point to the exact spot. See the data plate guide.
For scale only: the InterNACHI Standard Estimated Life Expectancy Chart for Homes lists Boiler at 40 years of expected service (nachi.org). That chart is a guideline, not a prediction for your unit.
Open the official Crown lookup takes serial number; returns warranty / registration lookup; URL verified live
This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.
What we could not confirm
- The era not stated format is documented but not decodable here: week/month position not parseable from prose: 'literal'.
- Boiler serials (CROWNB000530977) are sequential; the date is in the separate 'Series' field on the rating plate: either a literal date (3/18/2010) or a 2-letter month+year code (AI = Sept 2012). Indirect water heaters use YY-prefixed serials. Warranty search takes email + serial (returns not verified).
Sources
- https://www.building-center.org/crown-hvac-age/
- https://www.building-center.org/crown-water-heater-age/
- img: Crown-Style-2-Series-Update-2023.jpg
- https://www.velocityboilerworks.com/product-warranty/warranty-search/official