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How old is my Comfort-Aire heat pump?

Serial number age decoder for Comfort-Aire heat pumps: 5 format eras, the decode rule in plain English, transcribed tables, and the official lookup.

Serial number decoder for Comfort-Aire heat pump

Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.

Format example: RSF150300183

Format eras

How to read the serial

1995 to 2004 formatPARTIAL

Shape ##A-A##### · example 92A-C70097 · confidence low

Year
digits 1-2 (YY) -> 1992
Week or month
month = letter 3 (A=Jan..M=Dec, I skipped) -> Jan
Documented but not evaluated by the decoder: example 92A-C70097 does not decode with the derived engine.
Trap: Addison Products (APCO) style, used while Heat Controller owned Addison (~1995-2004; the example 92 predates that window - building-center's own note). Sequence after the hyphen may start with a letter.

era not stated formatVERIFIED

Shape AAA######### · example RSF150300183 · confidence medium

Year
digits 4-5 (YY) -> 2015
Week or month
month = digits 6-7 -> Mar
Plant
leading 3 letters = product series (mirrors model prefix)

Example: serial RSF150300183 decodes to March 2015.

Trap: Nordyne-built units (most recent Comfort-Aire). Same as Nordyne style.

era not stated formatVERIFIED

Shape AA#A###A######### · example EB5D302F320107830 · confidence medium

Year
digits 11-12 (YY) -> 2010
Week or month
week = digits 9-10 -> week 32
Plant
letters in positions 1-8 per Rheem scheme

Example: serial EB5D302F320107830 decodes to week 32 of 2001.

Trap: Rheem-built. Same as Rheem HVAC 17-char style (see Rheem rules).

era not stated formatVERIFIED

Shape ########## · example 0804237539 · confidence medium

Year
digits 1-2 (YY) -> 2008
Week or month
month = digits 3-4 -> Apr

Example: serial 0804237539 decodes to April 2008.

Trap: Goodman-built. Same as Goodman style.

era not stated formatVERIFIED

Shape A########## · example R0424070098 · confidence medium

Year
digits 2-3 (YY) -> 2004
Week or month
week = digits 4-5 -> week 24
Plant
leading letter = ICP plant code

Example: serial R0424070098 decodes to week 24 of 2004.

Trap: ICP/Carrier-built. Same as the ICP letter-prefixed style.

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.

Official lookup

No online serial lookup was found for Comfort-Aire 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

Sources

Comfort-Aire central air conditioner Comfort-Aire furnace All heat pump brands Guides