I have a 2008 Ford Taurus X and my air conditioning system/ climate control system will not change functions, ie: blows air out of main vents only regardless of use of defrost, etc. What could be causing this?
I have the same car and just fixed the exact same problem you just described.
It is NOT a vacuum problem. The blend door is electronically controlled my a small motor under the dash, to the right of the steering column. The clicking is coming from a stripped gear in that small motor unit.
On my Taurus X, what caused the motor to fail was the blend doors (which open and close depending on what your vent setting is on) getting stuck. That caused the motor gears to strip out and make a clicking sound every time the automatic climate control tried to move the blend doors.
The fix required a substantial amount of the dashboard to be taken apart. The blend doors were re adjusted and the motor control unit replaced.
I had the Ford dealership do the repair and it cost me $450. (Ouch!)
To make sure that's your problem, you can follow the clicking sound. You'll have to get on your back and look under the dash on the drivers side. Have somebody press the defrost button to cause the clicking sound. Once you find the small unit you can actually feel the gears slipping when it makes the clicking sound. It's really tight under there though and you'll probably need a flashlight.
SOURCE: blowes air throught defrost vents only
its a problem with the switching mechanism. you have to look up under the dash to see if you can see where the switching mechanism is. if you can not see it from there youll have to remove complete center dash
SOURCE: My front defroster doesn't work
Their is a vacuum actuated valve that redirects the flow of air from the panel to the defrost vents when the defrost is selected. I would check the vacuum line running to the valve while the vehicle is running with the defroster on and check whether or not the line is pulling a vacuum to actuate the valve, if not you obviously have a bad line or vacuum line fitting. If you have suction on the vacuum you will need to check the valve and see that is functioning properly. The valve is usually located under the dash on the passengers side. If you are mechanically inclined i would go to a local auto part store and pick up a repair manual for your car for about $20 as they contain diagrams and info that will save you alot of money.
GGBMDB
SOURCE: climate control system only blow air out defrost vent
there is a good chance that you blend air door is stuck closed over your heater core and therefore not allowing the heat to flow, also your door that opens and close your direction of flow from the floor ,das,vent and defrost.your going to have to remove the lower cowling of the dash on the passenger side analso some of the center dash to actually check to see if the cable,servo motors. are acuating the doors.the issue could be just a stuck door or a misaligned cable or that it came off. that falls under the mechanical side of probabilities. electrical would most likely be a faulty selector switch or a servo motor
SOURCE: climate control air only comes out of defrost
its prob your vaccum hoses that plug into the air unit control i had the same prob check make sure they r all plugged in...check the black hose that runs under your hood if it aint gettin a vaccumm then u prob have to change the door but if u r getting a vaccumm then its unplugged on your control unit.....
Testimonial: "great place to start, thanks, Bob"
SOURCE: climate control is on defrost only the auto
Check your vacuum pump located on the right side fenderwell. see if its running. Check the vacuum hose at the hubs for leaks or damage. repair if damaged. check for other vacuum leaks such as the grey hose going to the heater control valve.
Disconnect the negative battery cable and wait at least one minute for the air bag system to lose power. Make sure the front wheels are straight ahead and lock the steering column.
Detach the air bag module by removing the bolts from underneath both sides of the steering wheel and the electrical connector. Remove the steering wheel bolt and press the wheel away from the steering column. Remove the lower steering column cover.
Insert a 1/8-inch wire or pin punch in the shroud hole under the ignition switch while it's in the "Run" position. Press on the pin and pull on the ignition switch lock cylinder to remove it.
Disassemble and remove the instrument panel from the Taurus' interior. This includes the radio and all panels, electrical connectors, harnesses and screws. You'll need an assistant to help you lift and remove the instrument panel.
Drain the engine coolant from the cooling system, using a clean container for reuse. Remove the heater hoses, actuator and metal cover from the heater. Disengage the spring from the heater core cover and the lever.
Depress the locking ramp and remove the lever from the secondary air temperature control (the lever is brittle, so don't bend it). Remove the primary air conditioning air temperature control door shaft from the pin.
Remove the heater core cover and seal from the heater/air conditioning housing assembly. Remove the heater core from the heater/air conditioning housing by pressing on the core tubes and assembly.
Install the replacement heater core to the heater/air conditioning housing. Install the core cover, seal, lever, spring, metal cover, actuator and heater hoses.
Replace and assemble the instrument panel with your assistant's help. Connect the steering wheel (use a new bolt to connect it to the column), air bag and negative battery cable.
Refill the cooling system with either the old coolant or new. Start the Taurus' engine and let it reach normal operating temperature. Watch the climate control operation and check for any leaks.
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