I read somewhere that if it gets above 76  it may shut down or enter a protection mode and ramp up the fans to full speed.
My operation eco mode is below 70.  normal is 70-72.  fast is 72 to 74 with much higher fan speed.  room temp is around 78 Fahrenheit .
I cant run turbo with room temp above 72F. 

if you have high temp issues, Have you shut down and cleaned the fan and box recently?   I get the air compressor out and blow air back through the apollo to blow all the fine dust out of it outside. lots of dust comes out, then my temp drops when I restart.  In eco mode I am not collecting as much dust with quiet slow fan speeds.