How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
How do I tell the age of a Magic Chef or Armstrong furnace or air conditioner from the serial number?
Sunday, August 19, 2018
Although the Magic Chef nameplate was only in production during the 1980s and 90s, many furnaces were installed around the Gainesville area, especially in apartment/condos and mobile homes. The 8th digit of the serial number, which will be a letter (and typically the next to last digit) denotes the year of manufacture:
A = 1980 K = 1989
B = 1981 L = 1990
C = 1982 M = 1991
D = 1983 N = 1992
E = 1984
F = 1985
G = 1986
H = 1987
J = 1988
An example, shown below, is: A 10322EDB
The underlined letter indicates it was manufactured in 1983.
Some units will have the “Armstrong - Columbus, Ohio” nameplate on them, but follow the same serial number pattern.
To find out the age of another brand of air conditioner or heat pump, go to How do I determine the age of my air conditioner?, which has a listing of all major manufacturers and links to instructions for decoding their serial numbers.
To find the age of other home components, go to How can I find out the age of a roof? and How do I determine the age of an electrical panel? and How do I determine the age of my water heater? For life expectancies, visit What is the average life expectancy of the components of a house?
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To learn more about heating and air conditioning systems, see these other blog posts:
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