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Re: Cold Am . I turned the left knob 45 degree . All i...
if you are handy, you can remove the small dash panel where the a/c control knobs are and then you'll access the lever mechanism and most of the time you'll find a rusty lever or someting has jammed the lever.
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i have the same problem the acuator under the dash on the right side of the transmission hump controls the left side temp just disconnect it and it will stay on ac and in the winter plug it up put it on heat and disconnect it and it will save u alot of money and time
For clarification, it seems that you are getting air blown through the system but there is no temperature change, hot or cold?
Your heater control panel is cable operated with sliding knobs, not like the newer electronic controls with push buttons. It is a "mechanical" set up as opposed to an electrical situation.
Does the slider for the temperature control feel like it has tension and is moving mechanisms in the dash somewhere? If not, the cable, which has an "S" curve on the ends, may have slipped out of the arm either behind the heater control panel or at the AC box where the door is. Also, check the heater control valve on the firewall under the hood to see if the arm on the valve is moving properly when the temperature slider is moved.
When you push the "AC" button, do you hear fans under the hood/AC relays click on/idle drop? If not, you may have a separate AC issue, either very low or no freon. If the freon is just a little low, check the sight glass for the freon to see if you see bubbles when the AC comes on.
One of your deflector door servos or the door itself, is hanging up. To determine this more clearly, run your vehicle for about two minutes and shut down the engine. Move your function selector knob from defrost to floor to panel and listen carefully for a sweeeping sound. if you do not hear this sound you've got to check under the dash for a loose vacuum line or under the hood for a loose or broken line to the vacuum accumulator. The vacuum accumulator is a large black ball on the firewall with only two lines connected to it. One line is about3/32nds of an inch and the other will be about one quarter inch. Check these lines well, for they control ALL the functions within yout climate control. Best of luck my friend, Dana
the only thing that can change the air from hot to cold, or vice versa is the blender door. under your dash is a box which has 2 compartments. one with your heater core which is hot and one with ac which is cold. the blender door basically diverts which on the air in your car is being drawn from. if it is cold, air is moving on the ac side. if its hot, air is moving through the heater core side. if its warm, the door is in the middle. your temperature control knob is conecteted to an actuator, which moves that door. the actuator is a motor, but if it goes out, the door will be stuck on whichever side it is on. i would check that first. hope this helps
The heater valve is under the hood that lets the hot water into the system where the hoses go into the dash you can push it open with you fingers when its cold-is best, and the mixing door runs off a small motor, Its under the dash on the left side of the center console look around under there you can move them manually too and watch when you turn the switches you should be able to tell which motor or the switch is bad, either way you should be able to manually get the heat on.
I think you should check the air manifold on the control panel and try to find any broken or loose hose.
In addition, check the heat/cold dial knob, under the dash, there is a panel selector for hot air or cold air.
Also check for any broken vacuum hose under the hood.