I have a heat exchanger in the fridge meant to use up excess cooling to cool down the liquid refrigerant, however as soon as the gaseous refrigerant exits the pipe it instantly heats to over 5000 degrees while remaining a gas. Images are here: https://imgur.com/a/ebuxbDm
Thanks for the input! However, this was not the issue, it was something to do with pressure squares, pressure would leak over from the high pressure area to the low pressure area whilst not being displayed, causing it to heat up and cool down insanely quick and generating MASSIVE heat. I fixed it in my latest version by putting a layer of titanium in between them with the tmp set to 1.
The problem was not that the refridgerant wasn't getting cooled fast enough, the problem was that it was heating up when it wasn't supposed to.