How old is my ClimateMaster heat pump?
Serial number age decoder for ClimateMaster heat pumps: 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: K111300076
- ClimateMaster heat pump serial numbers in the 1998 to present format encode the year as letter 1 (table below) and the week as digits 3-4 -> week 11 (source: building-center.org).
- Example: serial K111300076 decodes to week 11 of 2007.
- ClimateMaster heat pump serial numbers in the before 1997 format encode the year as digits 1-2 (YY) -> 1992 and the month as letter 3 (A=Jan..M=Dec, I skipped) -> Sep (source: building-center.org).
- Example: serial 92J010915 decodes to September 1992.
Format eras
- 1998 to present VERIFIED
A#########letter 1: H=1998 A=1999 B=2000 C=2001 D=2002 E=2003 F=2004 G=2005 J=2006 K=2007 L=2008 M=2 - before 1997 VERIFIED
##A######digits 1-2 (YY) -> 1992
How to read the serial
1998 to present formatVERIFIED
Shape A######### · example K111300076 · confidence high
- Year
- letter 1: H=1998 A=1999 B=2000 C=2001 D=2002 E=2003 F=2004 G=2005 J=2006 K=2007 L=2008 M=2009 N=2010 P=2011 Q=2012 R=2013 S=2014 T=2015 U=2016 V=2017 (I and O skipped; W-Z presumably 2018-2021 and then a wrap - NOT charted)
- Week or month
- week = digits 3-4 -> week 11
- Plant
- digit 2 = factory code
| Year code | Year(s) |
|---|---|
| H | 1998 |
| A | 1999 |
| B | 2000 |
| C | 2001 |
| D | 2002 |
| E | 2003 |
| F | 2004 |
| G | 2005 |
| J | 2006 |
| K | 2007 |
| L | 2008 |
| M | 2009 |
| N | 2010 |
| P | 2011 |
| Q | 2012 |
| R | 2013 |
| S | 2014 |
| T | 2015 |
| U | 2016 |
| V | 2017 |
Example: serial K111300076 decodes to week 11 of 2007.
before 1997 formatVERIFIED
Shape ##A###### · example 92J010915 · confidence high
- Year
- digits 1-2 (YY) -> 1992
- Week or month
- month = letter 3 (A=Jan..M=Dec, I skipped) -> Sep
| 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 |
Example: serial 92J010915 decodes to September 1992.
Where the data plate is on a heat pump
On the outdoor unit, same place as a condenser: a plate on the side or back of the cabinet near the line set. The indoor air handler carries its own plate with its own serial.
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 Heat Pump at 10 to 15 years of expected service (nachi.org). That chart is a guideline, not a prediction for your unit.
No online serial lookup was found for ClimateMaster 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
- No official online lookup URL was verified for ClimateMaster.
- Style 1 (1998-2017 charted): year LETTER at position 1 (H=1998 precedes A=1999 - not alphabetical), week at 3-4. Style 2: YY + month letter. climatemaster.com = 200 but every warranty/support path tried 404 - no lookup URL. Page last updated 2013; letters after V=2017 are not charted.
Sources
- https://www.building-center.org/climatemaster-hvac-age/
- img: CLIMATEMASTER-1-Serial-Number.jpg (transcribed)
- img: CLIMATEMASTER-2-Serial-Number.jpg (transcribed)