i have a 88 vert my heater doesnt work by that i mean it dont blow but when my car is warmed up hot air comes out the vent any suggestions so i dont roast thanks

 

Does the air temp motor move when you flip the Logicon temp selector from hot to cold???

With the key on, but the engine not running, you should hear a small motor moving when you move the air temp selector.

If it doesn't move, you may have (in most likely order)
a bad Logicon
a damaged or disconnected linkage on the air temp motors connection to heater
a loose plug between the logicon and the dash (found above the accel pedal).
or a damaged or broken air temp motor.