WTF do I need to add to my machine start gcode to keep the case fan from coming on??!!

I currently have a M107 P3 in my start gcode and the case fan will still come on when print starts. What gives? I'm using orca slicer. I also tried removing the section about kicking fans on for PLA etc. I'm printing PETG and it will always kick the case fan on even with the M107 command. Do I need to use the M141 (chamber temp) command or something?