Question about Ford Taurus
Make sure you have the windshield defroster off , the cars computer turns the AC on to dehumidify the windshield as it blows in order to speed the defrosting of the inside glass.
If you have made sure the defroster is not selected on the climate control center , you may try a few other things to determine where your problem lies...
With the vehicle turned off , key out of the ignition , open the hood and unclip the small white plastic plug off of the compressor ( the electric clutch actuator plug). Start the car and see if the clutch is still engaged ...
If it is engaged , you have a locked up clutch on your compressor.
If the clutch disengages when unpluged ,turn the engine off and plug the clutch back in.
I would next determine whether or not the relay in the fuse block is malfunctioning..
The A/C system is more complicated than a switch and a power source .. When you push the button in the car to turn the AC on (or have the defroster on), a signal is sent to the PCM module , routed thru a pressure sensor on the AC coolant line (which has a 5v reference voltage) , back to the PCM where it is determined by the pressure of the coolant (freon) how fast the condensor fans will run , and a relay in the fuse block actuates , sending a 12v signal to the clutch on the compressor.
Posted on Aug 01, 2010
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Posted on Jan 02, 2017
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