2006 Pontiac Torrent Engine size  3.4L
Repairs for this problem = A/C Compressor
Question = torrent A/C compressor will not cycle off/on.  Temperature
at dash down to 29-30F ambient temp 95  after it freezes up I
manually turn off A/C switch. After it thaws,for a few minutes, A/C
Switch on. It does not want to cool again. A sensor sticks open or
closed can you tell me the probable sensor(s)and there location.
Answer: There are a couple different sensors located on your air
conditioning system. There is the high pressure sensor, which is on the
high side line just about at the attaching point to the a/c compressor.
There is also a sensor located inside the vehicle under the dash, in the
evaporator case. This the low temperature sensor, and would most
likely be the cause of your freeze up issues. It can be changed out
fairly easy, you just have to take the lower panels of the dash down.
You could also have an over or under charged system. That would
require an a/c machine to recover the system and see if it has the
correct charge. Other than that, there is not much that will keep the
compressor on at all times, especially since you can turn it off with the
switch. I would say most of the electrical components are ok.