While that might happen in home A/C units it sure doesn't in cars.

There is a difference in whether the low side pressure is a result of freon boiling or the suction capabilities of the compressor. The logic of the pressure argument must place the temp near absolute zero when a restricted expansion valve leaves a vacuum on the low side.

While there might be a very small area which conforms to the boiling temp analysis the total cooling is obviously down and the whole matter is occuring inside a large heat exchanger. Heat would quickly move to that localized cooling and to keep any area below 32deg F the rest of the heat exchanger (evaporator) would be within a few degrees (in other words - very cold). AND if that happened it would cycle.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician