Whirlpool funace age?

I know it was made by Heil Quaker, but the serial number doesn’t give me a clue -
Model #NULK080AG02
Serial # H438 11106

I know it wasn’t 43, 38 or 06 - I am confused - my ref material doesn’t list Whirlpool -
thanks in advance

1 Like

1984 38 week

Great chart robert

Thanks guys -
Great chart Robert - This is exacly what I have been looking for - my current chart doesn’t have near the info -

it’s listed in Preston’s Guide for gas and oil furnaces

But where, I can’t find it