Per my chart you should use the BLACKHORSE method to determine the age of the furnace however I could not find a letter in the serial number of the furnace. Any help. Serial #9106133067. Thanks.
Is it possible the Amana code is actually the Goodman code, as I understand Goodman owns Amana?
That would put the age at 1991. Does this sound right?
It does. 1975 home, definitely not the original furnace and then replaced after 16 years.
either 91 or 06. If Nordyne makes Amana, it’s 06.