Goodman HVAC Age: Serial Number Decoding for AC, Furnace & Heat Pump

How old is my Goodman AC or furnace or heat pump?

Answer: The first two numbers of the serial number represent the year. The second two numbers are the month.

9901 is January 1999, for example.

How to Read a Goodman Serial Number

Here are more details for your Goodman serial number lookup.

Goodman began making HVAC equipment in 1975 and has used the same serial number sequencing for manufacture dates from the beginning – that’s excellent foresight by Mr. Goodman and company!

Goodman uses the same sequencing on all of their HVAC products including furnaces, heap pumps, split systems, and air conditioning units.

Not Model #s: This post is about Goodman serial numbers, not model numbers. The model numbers use nomenclature related to series, capacity, and performance of Goodman HVAC equipment.

Age of Unit: Goodman AC, Furnace or Heat Pump

Here is how to read a Goodman serial number.

The encoded serial number on the rating or data plate will tell you the year and month the unit was made. Goodman uses 10 character serial numbers on all of their HVAC products. The characters are all numbers.

The first two digits indicate the year the furnace was made. For instance, if the first 2 numbers are 02, the year is 2002, 05 is 2005, 10 is 2010, 18 is 2018, etc. The 3rd and 4th numbers represent the month. For instance, 01 is January, 02 is February through 12, which is December.

Sample Serial #: 040852398

Year: The 1st and 2nd numbers are 04, so the year is 2004.

Month: The 3rd and 4th numbers are 08, so the month is August.

Manufacture Date: August 2004

Goodman has one of the simplest serial number codes. If you do a lookup on serial numbers from some other brands, you get the impression the manufacturer is trying to confuse you.

Here is an image of a Goodman packaged air conditioner information/data plate. The first four digits of the serial number are 1609, so this unit was made in 2016 (16) in the month of September (09).

Types of Goodman Equipment Using 10-Character Serial Numbers

These numbers are used on most Goodman equipment. This includes air conditioners, heat pumps, packaged units, gas furnaces and air handlers.

Serial numbers are used for more than just determining the age of a Goodman product. For example, they are important when a product recall happens. In 2017, The US Consumer Product Safety Commission recalled some Goodman air handlers that posed a shock risk. The recall affected units with serial numbers beginning with 1511, 1512, or 1601 through 1610.

Can you determine when the units were made? Using the information above, these Goodman air handlers were manufactured from November 2015 (1511) through October 2016 (1610).

Where is the Goodman Serial Number?

The Goodman serial number can be found on the furnace’s rating plate, also referred to as a serial plate or data tag.

This plate or label is a thin piece of metal usually located on the outside of the cabinet. It might be on the inside of some furnace cabinets – you’ll have to remove the cover and look inside for it.

Typically, for ACs and heat pumps, you can find the serial number on the side or at the top panel. It may also be placed on the back of the unit or inside the cabinet.

You will know it when you see it. The rating plate will contain the serial number and the model number. The words “serial number” might be written out, or it could be listed as serial # or S/N. The tag will have additional information about the voltage, size and specs of the unit plus certifications, if applicable.

Written by

Rene has worked 10 years in the HVAC field and now is the Senior Comfort Specialist for PICKHVAC. He holds an HVAC associate degree from Lone Star College and EPA & R-410A Certifications.

2 thoughts on “Goodman HVAC Age: Serial Number Decoding for AC, Furnace & Heat Pump”

  1. I have a 30 year old house with older thermostat wiring. However, nine years ago I had an Amana Goodman variable speed communicating heat pump installed with a Comfort Net touchscreen Wi-Fi enabled communicating thermostat. The thermostat recently stopped working and had to be replaced. Comfort Net model is discontinued so had Honeywell smart programmable touchscreen thermostat installed instead that is supposedly compatible with variable speed heat pumps. However, the reversing valve on the heat pump is now not operating properly. Is this most likely a wiring configuration issue? Or is there a better thermostat model you can recommend other than Honeywell that is more compatible with a nine year old Amana Goodman variable speed communicating heat pump of this type?


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