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Jun20-08, 06:14 PM
P: 8
Quote Quote by denni89627 View Post
The compressor cuts off when the pressure regulator tells it to. If the pressure gets too high the evaporator will freeze. Hence the compressor cycling can be different based on outside temp, humidity etc.
Sorry for reviving this old thread, but what exactly is the conclusion to this discussion?

I'm very interested, as I'm soon going on a long road trip in a rented Chevrolet Aveo which, I presume, utilizes a simple A/C on/off switch with no thermostat. Will we be best off cycling the switch or leaving it on and turning up the temperature knob? I am guessing that we, in spite of the pressure regulator, will save more fuel by cycling the switch?