1995 Chevy Caprice Heater problem

Welcome to the 2CarPros Forum, The climate control system has a plastic door separating the heater core from the A/C evaporator. The door is controlled by an electric motor, located on top of the black plastic housing behind the glove box. Your symptoms indicate a possible malfunction of this door. Some causes are, inoperable motor, foreign object, such as a pen hindering the door or the signal from the blend door switch missing. Try turning the knob from cold to hot while listening for the doors action.

I hope this information is helpful, let me know if I can be of further assistance.