A lot of air problems
 

Okay so my jeep is having a few problems with the air.

1. My air almost never will come out of the front or foot vents. It always wants to come out of the defrost vents. And if I try to change it it makes a whistling noise.
2. My heat won't work unless I'm accelerating.
3. Sometimes the air won't turn off and it will blow warm sometimes hot air out of the defrost vents unless the a/c is on.

1 check for debris in the way of the vents
2 check your blower motor
3 ?? no idea