L31MaxExpress
I'm Awesome
The evaporator is substantially warmer than the refrigerant boiling in it. I find there is about a 10-15* discrepency between evaporator surface temperature and the theoretical temperature based off the pressure/temperature chart. My 97 holds around 30-35F center vent temps for hundreds of miles without freezing up. Center vent has seen 26F before the compressor cycles without the core freezing up. What ends up happening is the ice will start to form, block heat transfer, reducing the pressure, forcing the system to cycle and the ice to melt. Rinse and repeat.The stock switch I'm using cycles off at 26 PSI. How do you keep your evaporator from freezing at 22 PSI, that is like 25 degrees?