mayphire

• Caterpillar Serial Number Year Of Manufacture

I have an older Rheem furnace that I'm trying to narrow down how old it is. The electrical service had a tag on it dated 1973, but that doesn't mean the furnace has never been replaced. It's a Rheem 3404-125GB, serial number XK69JN3B004 2287 Since the '2287' is off by itself, I first thought maybe it was the sequential build number. But now I'm wondering if it's the date code. Every place I look for Rheem serial number decoder rings says that the 4 digits after the 'F' in the number are the date code. However, my serial has no 'F'.

Any insight would be appreciated! Similar Threads: • • • • •. Since the '2287' is off by itself, I first thought maybe it was the sequential build number.

Caterpillar Serial Number Year Of Manufacture

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But now I'm wondering if it's the date code. Every place I look for Rheem serial number decoder rings says that the 4 digits after the 'F' in the number are the date code. However, my serial has no 'F'. As I recall, the newer ones had a letter followed by four numbers which were typically in front of the serial number. The letter indicated the plant at which the unit was manufactured and the four numbers which followed were the week and the year, but. Like you said, there is no letter in front of those four numbers, so.