How old is my GE/GeoSpring water heater?
Serial number age decoder for GE/GeoSpring tank water heaters: 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: 1108903259
- GE/GeoSpring water heater serial numbers in the era not stated format encode the year as digits 3-4 of the numeric part (YY) and the month as digits 1-2 of the numeric part (source: building-center.org).
- Example: serial 1108903259 decodes to November 2008.
- GE/GeoSpring water heater serial numbers in the era not stated format encode the year as digits 3-4 (YY) and the month as digits 1-2 (MMYY prefix) (source: building-center.org).
- Example: serial 0804B10488 decodes to August 2004.
Format eras
- era not stated VERIFIED
##########digits 3-4 of the numeric part (YY) - era not stated VERIFIED
####A#####digits 3-4 (YY)
How to read the serial
era not stated formatVERIFIED
Shape ########## · example 1108903259 / GE 09022246884 / GENG 0601D13586 / RN0197147899 · confidence high
- Year
- digits 3-4 of the numeric part (YY)
- Week or month
- month = digits 1-2 of the numeric part
- Plant
- letter after the date digits when present
Example: serial 1108903259 decodes to November 2008.
era not stated formatVERIFIED
Shape ####A##### · example 0804B10488 · confidence high
- Year
- digits 3-4 (YY)
- Week or month
- month = digits 1-2 (MMYY prefix)
- Plant
- letter at position 5
Example: serial 0804B10488 decodes to August 2004.
Listed under Rheem in the source; GE/GeoSpring 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 water heater
The rating plate is a large label on the side of the tank near the top or beside the control. The serial is printed on it, often beside the model number and the ANSI standard line.
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 Water Heater (conventional) at 6 to 12 years of expected service (nachi.org). That chart is a guideline, not a prediction for your unit.
Open the official Rheem lookup takes serial number; returns warranty terms and coverage; 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
- GE/GeoSpring is treated as sharing Rheem'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 GE/GeoSpring.
- building-center documents only the Rheem-built MMYY styles. GeoSpring heat-pump units (GE Appliances, Louisville 2010-2016; later Bradford White) NOT documented in any fetched source - UNSOURCED for GeoSpring specifically.