![]() ![]() If it does not look 40 years old (how old is the house?, does it look original to the house?), then I would go to the four separate numbers, and state in the report that the age of the unit could not be determined, but that the unit is old and is likely in need of replacement. So I went back to the way some used to identify their units: the first sequence is some of the serial numbers used to be letter for the plant it was manufactured at, another letter for the month of manufacture, and two numbers for the year of manufacture - thus my 11/1969 mentioned above. like you said, there is no letter in front of those four numbers, so. The letter indicated the plant at which the unit was manufactured and the four numbers which followed were the week and the year, but. However, my serial has no "F".Īs I recall, the newer ones had a letter followed by four numbers which were typically in front of the serial number. but now I'm wondering if it's the date code.Įvery place I look for Rheem serial number decoder rings says that the 4 digits after the "F" in the number are the date code. Since the "2287" is off by itself, I first thought maybe it was the sequential build number. ![]()
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