Help with age of this Temp-O-Matic furnace.
Serial #: C8027932
1980? if its a Williamson Temp-O-Matic. Is this the model#1117-10-5
Did you open the air handler to see if there was a year date on the air handler? Some of those old furnaces have the date stamped on the blower drum.
You can call Williamson and ask them. 1-800-736-2378