How old is my Viessmann boiler?
Serial number age decoder for Viessmann boilers: 1 format era, 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: 73748610026311101
- Viessmann boiler serial numbers in the era not stated format encode the year as 8th digit = last digit of year (0 => 2000/2010...) and the not encoded (source: building-center.org).
- Example: serial 73748610026311101 decodes to 1950 or 1960 or 1970 or 1980 or 1990 or 2000 or 2010 or 2020.
- The era not stated format is ambiguous: Decade ambiguous; building-center's own tip says contact Viessmann for an exact date.
Format eras
- era not stated PARTIAL
#################8th digit = last digit of year (0 => 2000/2010...)
How to read the serial
era not stated formatPARTIAL
Shape ################# · example 73748610026311101 · confidence low
- Year
- 8th digit = last digit of year (0 => 2000/2010...)
- Week or month
- not encoded
Example: serial 73748610026311101 decodes to 1950 or 1960 or 1970 or 1980 or 1990 or 2000 or 2010 or 2020.
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.
No online serial lookup was found for Viessmann in our research. The manufacturer's customer service line, the installer's invoice, or a printed date on the plate are the remaining authorities.
What we could not confirm
- The era not stated format is only partially confirmed (PARTIAL).
- No official online lookup URL was verified for Viessmann.
- Only the year's last digit is encoded (8th digit); serials are 12-18 digits; decade needs the plate's US/Canadian listing year or Viessmann. viessmann-us.com warranty page 404.
Sources
- https://www.building-center.org/viessmann-hvac-age/
- img: VIESSMANN-Date-of-Manufacture-Serial-Number-Style-1.jpg