How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
How can I tell the age of an old Singer air conditioner or furnace from the serial number?
Tuesday, May 28, 2019
Every time we come across an ancient Singer HVAC system we say “this has got to be the last one we will ever see." And then another Singer turns up a few months later. Eventually they will all be gone but, in the meantime, here’s the serial number code: look for a single letter in the center of the serial number, which will denote the year of manufacture. We suspect that the adjacent two numbers are the month, but not sure.
A = 1973, B = 1974, C = 1975, D = 1976, E = 1977, F = 1978, G = 1979, H = 1980, J = 1981, K = 1982. In 1982, it became the climate control division of Snyder General and the name was dropped, although Daikin now owns the brand and manufactures mini-splits under the Singer name in Thailand. So the “F” in the serial number below indicates the unit was manufactured in 1978.
For the age of another brand or manufacturer, go to our blog post How do I determine the age 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:
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