I verified that the 94 Accord ac compressor will only run when the defrost is on or when the ac button is pushed, it doesn't run when the selector is on "vent" and "recirculate" without the ac button pushed. In fact, I feel the car shudder when driving at interstate speed as the compressor kicks on and off as the position of the ac button is changed.
Perhaps newer ones don't, or I'm just misremembering what the Sable manual said. To complicate things some, we have the auto climate control, and I was checking to see if it was possible to just turn on the fan without the compressor. It is, but it isn't clear on the control panel when you have to set an actual temperature. I'm not fond auto climate systems.
windows down at any speed (A/C busted for 7 years now and too cheap to fix it)
I think myth busters did a bit on this one but I don't recall what they found with it. they used an explorer and ran an entire tank through at a closed course/race track. it was late and I fell asleep. really wish I would have caught the end of that episode.
Be the change you wish to see in the world