YORK Furnace and A/C Age?

[Christopher Rich Iii]

Thanks in advance for this, I usually don't have much trouble with York, but could not get any definite age on these two units!

Central A/C
Serial # wkjm006517

Furnace
York Diamond 90
Serial# ehjm431266

Thanks again,
Chris

[Bruce A. King]

3rd letter in serial is J so its a 1979 or 2000

If it looked old then its 1979.......

[Russel Ray]

I'm with Bruce on this one.

[Christopher Rich Iii]

Thanks Bruce and Russell!!
The units did not look that old, my thoughts as well.

Regards,
Chris