There are four variations of the Coleman and Coleman-Evcon serial numbers. The first one, which was used through 1991, has the year encoded as the second two digits of the serial number. The example shown below was manufactured in 1979.

   Beginning in 1992, the first two digits of the serial number indicate the age. If the condition of the unit does not make it clear which two numbers are the right ones to use, look for ANSI or other government standards that the system complies with that have the year of the standard in them. Here’s an example of the later Coleman-Evcon style serial number below, indicating the furnace was manufactured in 1994.

    Coleman was acquired by Beacon Capital Corp. in 1990 and the Coleman-Evcon brand created, then the company was purchased by the York/Unitary Products in 1996. 

    Newer units use the one of the two York serial number systems. Go to our blog post How can I tell the age of a York air conditioner or furnace from the serial number?  to see if your serial number matches one of their formats.

    Here’s an example of one of the newer Coleman formats below. The second and fourth digits of the serial number A0G659923, which are also the first two numbers, indicates a 2006 year of manufacture.

    To determine the size of a Coleman or Coleman-Evcon system in tons, see our blog post  For the age of another brand or manufacturer, go to our blog post How do I determine the age of my air conditioner? 

   To determine other key specs of your HVAC system, see one of these other blog posts: 

• How can I find out the SEER of my air conditioner?

• How can I tell whether the condenser (outdoor unit) is an air conditioner or heat pump? 

• How can I find out the size of my air conditioner?  

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Field Guide for Home Inspectors, a quick reference for finding the age of 154 brands of HVAC systems, water heaters, and electrical panels, plus 210 code standards for site-built and manufactured homes, and the life expectancy rating of 195 home components. Available at amazon.com for $19.95.
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  To learn more about heating and air conditioning systems, see these other blog posts: 

• My air conditioner won't turn on. What's wrong? 

• How can I find out the size of my air conditioner? 

• Where is the air filter for my central air conditioner and furnace? I can’t find it? 

• Does an old air conditioner use more electricity as it ages? 

• How did homes stay cool in Florida before air conditioning? 

• What is wrong with an air conditioner when the air flow out of the vents is low?

• Why has the thermostat screen gone blank? 

• Why does it take so long to cool a house when an air conditioner has been off for a while? 

• Why is my air conditioner not cooling enough? 

• What are the most common problems with wall/window air conditioners?  

• Will closing doors reduce my heating and cooling costs? 

   Visit our HEATING AND AIR CONDITIONING page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.