Help with Amana age?

The Model # was a little torn and worn after the SPD so I could not read a couple of them but this is what I got-SPD…40701A. Serial # 9103077436

It is a gas comb. unit

First two digits of the serial number are the year. Second two are the month.

1991 - March

Thanks for the quick response Jae. I always thought Amanas were more complicated than that.

They used to use what was called the “blackhorse” system–very complicated. The company was sold to Goodman about 1988 and everything got easier.