I came across the heat pump below yesterday and want to make sure I’m reading the age of the unit correctly, because I was told that it was the original unit that was put in when the house was built in 1990. I see this unit as being manufactured in 2000, which means it had to have been a replacement unit.
Rheem, Model No. RPNJ-031JAZ, Serial No. 6158 M2100 18568
If it was a furnace it would be the 21 week of 2000. In the seral number the 4 numbers following the M are the week and year of mfg M2100. I will double check to see if that would be the same for the heat pump.
That’s what I have too.
Rheem & Rudd[FONT=Times New Roman,Times New Roman][size=3]: in the middle of the serial number will be a letter “F” or “M” the following four numbers are the week and year. [/size][/FONT]
[FONT=Times New Roman,Times New Roman][size=3][/size][/FONT]
[FONT=Times New Roman,Times New Roman][size=3]and here
Thanks. So it is obvious that this unit was replaced.
That sounds about right, same for an AC.