My 86 zx turbo has recently been solely blowing cold air out of the floor vents. It is winter and it has been around the freezing point for about the last month. The heater/AC is climate control so it isnt a warm/cold dial its a digital display. The heater still blows out cold air when the display is set at 90 deg.F even after the engine is a running temperature. Thanks to anyone who has help or anything to say on this topic.