Armstrong Air Conditioning Serial Numbers

How do I tell the age of a Magic Chef or Armstrong furnace or air conditioner from the serial number?

  • The serial number is formatted by 4 numbers, a letter, then 5 numbers. The first two numbers are the week of manufacture and the following two numbers are the year of manufacture. The date of manufacture can usually be found on these units. Which aircon brand is the best? – American Standard Air Conditioners. – Carrier Air Conditioners.
  • I have an Armstrong Air air conditioner Model # 2scu13LE148p-1 Serial I have an Armstrong Air air conditioner: Model # XXXXX Serial 1606B21768 A/C wasn't cooling last night, so I went out and checked the condenser and the fan was not running and the unit was pretty hot.
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Numbers

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:

The Armstrong SCU10 is a discontinued 10 SEER air conditioner. Documents on the unit date back to at least 1997. It is considered an entry level, split system unit. How do I tell the age of an Armstrong Air furnace or air conditioner from the serial number? The 8th digit of the serial number, which will be a letter (and typically the next to last digit) denotes the year of manufacture for units manufactured from the 1980s to the early 1990s: A = 1980 I = (not used).

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:

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

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

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

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

• 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 CONDITIONINGpage for other related blog posts on this subject, or go to theINDEXfor a complete listing of all our articles.

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