The only word I can think of is perdition, as in if you do not want to be hot in perdition then you really need to air condition?
There is a handle that you pull to close the vent that blows hot air into the balloon.
The Air Conditioner is on
Differences in air pressure.
One thing to do is to check the A/C Relay. Mine wasn't plugged in once and it did that.
Well the main reason why your car blows out cold then hot is because the air conditioner may not be working properly. You should go to the car shop and get it fixed.
If the ambient (air) temperature rises and the A/C blows warm air, it probably means that you need to add freon.
Cheap
the system is probably out of coolant.
refill the a/c, it will blow hot air with no refrigerant in the vehicle.
blows hot air from his trunk
low freon