Daig
Your van is a NCV3 (2007 and newer)
If the red light is on your a/c is at rest. That's how I remember it. If you push the defrost button the red goes out meaning the a/c compressor is running. If you want conditioned air push the button, light goes out, compressor starts.
A nice feature if you can remember to do it is turning the temp control all the way warm or all the way cold depending on the season, and push the a/c rest button when you exit the van (key off). The fan will come on to position 1 and will continue to run for 30 minutes or some predetermined battery voltage to pump conditioned air into the cabin in your absence. A Reilly nice feature in cold environments.
gary