Need age on Rheem furnace

Specific Inspection Topics Inspecting HVAC Systems
1

I would appreciate any help. Trying to determine the age on this Rheem forced air unit. Model RGDA-100C-ER

Ser# CN3D104 F4683 9228

Thanks in advance

2

Hi to all

Prestons list this model from 1989 to 1992 from the serial i would say it is a 1992 unit

Regards

Gerry

3

Thanks Gerry!

4

Interesting Gerry, according to my cheat sheet Rheem serial numbers have an “F” in the middle followed by the week & year of manufacture. In this case I’d say 46th week of 1983.

5

Where the hell did you get a cheat sheet like that?

6

Thanks Michael. I’d be interested in one of those cheat sheets too!

7

I agree with Michael, 1983.

8

It’s the one that get’s posted here about once a week or so :slight_smile:
Try:

9

Jeffrey and Richard, this may be helpful:

10

Michael,

Prestons Guide sucks I mean really sucks

Regards

Gerry

11

Hey thanks for those cheat sheets I come across that **** a lot it seems like.

12

Definitely 1983
CN3D104 F4683 9228
The last two numbers of the second set is your year code.

13

Thanks to everyone. It’s nice to know that I can get answers from NACHI brothers/sisters!

14

Prestons has some good stuff in it, but I think the good stuff only accounts for about 50% of what’s in there. One also needs the Technical Reference Guide, which I’ve found to be far more accurate than Prestons.

And the others have it right; it is the 46th week of 1983.