I have no idea what I'm doing.
I have a 1975 Rheem furnace model number 3204-80J0. It was 92 today, so I clicked the a/c on and the outside unit didn't turn on. The fan came on high speed as usual inside. So I went outside to check the unit and the fuses were good. Getting 240v to the contactor (?). So I went inside to investigate and there was a burning smell coming from the furnace. I killed power to it and pulled the panels off to find a transformer on the left side super hot. I'm guessing it's a step down transformer? Is this thing replaceable? I can't find a worrying diagram anywhere so I'm lost. Any help would be appreciated.