That covers the light issue, but what about causing the refrigerator/compressor to turn on, which should be assur as well? Enjoy explaining that one.
No different than opening your house door in winter knowing it will cause your heat to kick in, which is definitely a deoraisa.
CMIIW but neither of those things are true.. that it's 100% guaranteed (or even 51% likely) that those actions will lead to those stated results. Unlike the light.
Would it make a difference if it was 1% true. I have opened a refrigerator and heard the compressor kick on.
In this case it somewhat makes a difference how old the fridge is. In older fridges the system was entirely dependent upon a mechanical thermostat and you could never really know if the it was getting close to turning on and the "blast of warm air" from opening the fridge would make it turn on right when you open the fridge or not. In such a case it is a well known controversy whether or not one is required to be concerned that it is at that point.
In newer fridges there is chip which will turn the system on whenever the door is opened. Therefore one would need to use a device which holds down the switch to prevent this. THis is not a loophole. There is nothing wrong with opening a fridge. The problem is similar to the light.