Wiring?? Help!!

I have a 1992 honda prelude si. Whenever my defroster is on and i switch it to the heater to blow on me, it won't work, it just stays on defroster blowing on the windshield, with the exception of one vent right next to the passenger seat. Similarly, if I have it on heater setting where it blows on your legs and feet and switch it to blow on me, it won't work. So basically I can't get my heater to switch where it blows onto me. Could this be wires loose in the dash? Because a lot of times at night when i turn my lights on, the climate lights won't come on, and I'll have to give the dash a good smack. I need to get this problem solved before winter and I freeze my ass off cuz my heater isn't blowing on me. Please help me somebody...
-Thanks-

Is It Blowing Any Air At All ?? U Probably Have A Bracket Loose.

I have a 1992 honda prelude si. Whenever my defroster is on and i switch it to the heater to blow on me, it won't work, it just stays on defroster blowing on the windshield, with the exception of one vent right next to the passenger seat. Similarly, if I have it on heater setting where it blows on your legs and feet and switch it to blow on me, it won't work. So basically I can't get my heater to switch where it blows onto me. Could this be wires loose in the dash? Because a lot of times at night when i turn my lights on, the climate lights won't come on, and I'll have to give the dash a good smack. I need to get this problem solved before winter and I freeze my ass off cuz my heater isn't blowing on me. Please help me somebody...
-Thanks-

your best bet for now is to wear think clothing so winter wont freeze your ass. I only do AC/Heater troubleshooting during summer time.

When i switch it from the defroster to the air blowing on me, it will continue blowing on defrost, and i'll have to smack the dash good for it to switch over to blowing on me.