I have all the Preston info and the great info from the users on this site for gas appliances and AC exterior units.
I do not have anything for Electric furnaces.
I have a Carrier furnace model number 40AQ030300BU serial number 0886A69122
my guess is a 1986 model.
But I’d like to get a reference guide or cheat sheet if anyone has the information to get this.
Thanks, !!!