6/28/2023 0 Comments How to read a lennox model number![]() Same compressors.Īlso question is, how old is my comfortmaker furnace? There may be a few more unnecessary bells and whistles on a carrier unit, but that's about it. Likewise, is comfortmaker the same as carrier? Comfortmaker is a subsidiary of carrier. More recently date of manufacture information is found closer to the middle of the serial number. ![]() In the 1960s and early '70s this was the last four digits. ![]() In this manner, how do you read carrier serial numbers?Īge: Four digits of serial number indicate date of manufacture where first two indicate the week and the third and fourth are the year. So the serial number shown below indicates a 2007 manufacture date. The first two numbers after a single letter in the serial number are the year of manufacture of a Comfortmaker system by International Comfort.
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