Home / Brands / Bosch Water Heaters / Tankless Water Heater

How old is my Bosch Water Heaters tankless water heater?

Serial number age decoder for Bosch Water Heaters tankless water heaters: 1 format era, the decode rule in plain English, transcribed tables, and the official lookup.

Format eras

1998 to 2009 VERIFIED
#########digit 1 = last digit of year; decade from the month code: 61-72 => 1990s, 81-92 => 2000s

How to read the serial

1998 to 2009 formatVERIFIED

Shape ######### · example 388123456 / FD687400341 · confidence medium

Year: digit 1 = last digit of year; decade from the month code: 61-72 => 1990s, 81-92 => 2000s
Week or month: month = code: 1990s Jan=61..Dec=72; 2000s Jan=81..Dec=92 (388 = Aug 2003; 687 = Jul 2006)

Documented but not evaluated by the decoder: week/month position not parseable from prose: 'month = code: 1990s Jan=61..Dec=72'.

Trap: All three leading digits are needed; year digit alone repeats every decade. Chart covers 1998-2009 only; beginning 2010 the manufacture date is printed on the rating tag.

Listed under Bosch water heaters in the source; Bosch Water Heaters is named in that format's family and the corporate link is an estimate, not a checked fact.

Where the data plate is on a tankless water heater

On the side or bottom of the wall-hung cabinet, or inside the front cover on the frame.

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 Instant (on-demand) Water Heater at 10 years of expected service (nachi.org). That chart is a guideline, not a prediction for your unit.

Official lookup

No online serial lookup was found for Bosch Water Heaters 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 1998 to 2009 format is documented but not decodable here: week/month position not parseable from prose: 'month = code: 1990s Jan=61..Dec=72'.
Bosch Water Heaters is treated as sharing Bosch water heaters's format because the source lists it in that family; the corporate relationship itself is an estimate.
No official online lookup URL was verified for Bosch Water Heaters.
Tankless: first 3 digits (after optional FD) = year digit + month code whose range shifts per decade. From 2010 the date is printed on the plate. Modern 8370-853-000213-7736502725 style = see Bosch HVAC page (not fetched).

Sources

https://www.building-center.org/bosch-water-heater-age/
img: BOSCH1/BOSCH2-Tankless-Water-Heater-Age.jpg (chart credit hisearch.web.officelive.com 2011)