Why your AC wont blow cold air just a little bit when is running?

Answer 1

Based on your abbreviated question, right now I can think of only two causes for the problem First, and probably more common than the second cause, is that your A/C system has developed a leak, and has lost a major part of the coolant [Freon]. That would require that the leak be located and repaired, and an evacuation and recharge of the cooling system. The other possible cause is that the "air blend door" in the plenum box, usually below and farword of the glove box, is not working properly, and is blending in too much hot air. Most modern automotive heating/cooling/ventillation systems "adjust" the temperature of the air into the passenger compartment by mixing hot air [hot coolant from the engine] and very cold air from the air conditioning evaporator core. This is accomplished by a door which changes position in order to provide more cold and less hot air, or vice versa. You adjust the position of the blend door when you set the system control to heat or air conditioning, AND the level of heating or cooling by adjusting the temperature control. Usually, the blend door is operated by vacuum from the engine, and IF there is a vacuum leak, or the hinge pins of the door are sticking, then the air blend door will not respond to the temperature adjustment you set with the controls. Also, it is possible that there has been an accumulation of all kinds of debris [leaves, candy wrappers, plastic shopping bags, etc.] inside the plenum box, which jambs the air blend door. Depending on your skill level, and equipment available, it may be better to have an a/c technician, or a qualified mechanic check out your a/c system.j3h.