WaterFurnace serial number starting with C: 1987 or 2012
In the WaterFurnace 1985 to 2012 format the year letter C means 1987 or 2012. Two or more years share this letter, so the plate's other dates or the official lookup settle it.
Serial number decoder for WaterFurnace
Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.
Format example: UJ1087
- A WaterFurnace serial number starting with C was built in 1987 or 2012 (1985 to 2012 format; source: building-center.org).
- A-F are double-assigned (1985-1990 and 2010-2015) - disambiguate by plate style/ANSI date. Chart lists D-F as 2013-2015 even though style 1 supposedly started 2012. Example = Sep 2004.
The full year-letter table
| Year code | Year(s) |
|---|---|
| A | 1985, 2010 |
| B | 1986, 2011 |
| C | 1987, 2012 |
| D | 1988, 2013 |
| E | 1989, 2014 |
| F | 1990, 2015 |
| G | 1991 |
| H | 1992 |
| J | 1993 |
| K | 1994 |
| L | 1995 |
| M | 1996 |
| N | 1997 |
| O | 1998 |
| P | 1999 |
| Q | 2000 |
| R | 2001 |
| S | 2002 |
| T | 2003 |
| U | 2004 |
| V | 2005 |
| W | 2006 |
| X | 2007 |
| Y | 2008 |
| Z | 2009 |
Month letters
| Month code | Month |
|---|---|
| A | January |
| B | February |
| C | March |
| D | April |
| E | May |
| F | June |
| G | July |
| H | August |
| J | September |
| K | October |
| L | November |
| M | December |
Official lookup: the authority
Open the official WaterFurnace 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.
Sources
- https://www.building-center.org/waterfurnace-hvac-age/
- img: WaterFurnace-HVAC-style-2.jpg (transcribed)
- https://warranty.waterfurnace.com/official