Question about 2006 Ford Crown Victoria
Before you start your engine look at the A/C clutch. If you want, put a mark on it with chalk or paint.
Start your car and turn on the A/C, then look under the hood and see if the A/C clutch is turning. It may cycle and try to work. If it does not there is a switch close to the black cylinder where the A/C lines run.
This is the low pressure side of the system. If you remove the connection and put a "U" shaped wire into the harness it will arc and engage the compressor while the engine runs. Do not plug this in with the engine off. If the compressor clutch works then your problem is low pressure or a bad low pressure swtch. If the compressor clutch does not work it is very likely the bad part or you blew a fuse.
If the compressor turns and sounds like a stone crusher your compressor is bad. Now if you have determined the compressor is good, the clutch is good,the fuse is good, you have to diagnose the low pressure.
You will need a gauge. Some cans come with them but they are not always reusable. If you add 1 can of Freon and use the "U" shaped wire where I told you, it will draw in enough to start the refill without the "U" shaped wire. You still need to measure the pressure so you do not overfill the unit. A completely empty system will take about 3 cans.
You can lose the Freon through a leak, there are leakstop chemicals for A/Cs. You may get assistance from Autozone or Oreillys on this matter. Freon usually lasts for years. I have replaced many low pressure switches and had immediate success where it was the ONLY problem.
Posted on Nov 16, 2009
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Posted on Jan 02, 2017
this problem is caused by a defective air temperature control blend door actuator motor, it is about center of dadsh in air ducting, it moves the door that diverts air for cold from ac or hot from heater, you must remove the dash to repace it, about a 15 hour job fotr a home mechanic with a factory repair manual, nearly imposs without one.
Posted on Sep 04, 2009
My 2006 Crown Victoria developed the same issue you describe. The problem was corrected after dealer replace the EATC Control Assembly .. Part number 3W7Z-19980-AA
Everything worked great again until 30,000 miles later a similar problem has now shown up. The fan speed control does not slow the blower down past about 75 percent of full speed.. It's like it only has the upper 25 percent of fan speed range now. No change going from auto to manual.. I can still control where the air blows but have lost most of the control over the fan speed.
Posted on Aug 10, 2009
Chances are the electronic/digital HVAC control unit is bad. This same problem happened to me and I had to replace the entire unit. The dealer wanted to charge $800 for just the part! After I freaked out on them, they found a used one for less than half. Sorry, but there's no easy fix here.
Posted on Jul 19, 2008
Ok, here is the scoop on this. if you sit in the passenger seat and reach under the dash in the center of the vehicle. So your laying in the passenger side of the vehicle and placing your right hand on the floor board were passengers feet would go, slightly to the left of there is where the carpet raises up to the center hump behind the button for emergency flashers. Ok there you will see or feel a plastic small arm attached to a wire rod. this plastic arm is most likely broke or like mine the its worn, so push it back inside the small hole, while turning the heat switch from cold to hot. All this little arm does is open and close the heat vent, but also allows the air conditioner to fully turn on. As you turn the heat switch you will see, or notice it catches the mechanism and the heat will switch on or the air will come on as you turn the switch. I had only a few minutes left to short fix this so I opted to glue the darn thing in place, yes a quick fix but its working and after only looking and poking around I now know what this is so when I have time i can fix it. My own mechanic whom I trusted for years said look its the heater box major repair. I know he doesn't care to work on Vw's its all good but it cost almost nothing to repair this badly designed item. I was ready to sell as is and take the hit but waited one more day when I could find my good flashlight and just refused to believe I had to take off the dash. So dont go to dealer unless you have the time and you point out whats wrong, they also said it was both the air compressor and a cracked heat box? find and locate it yourself I don't have a warranty on this 2002 1602,000 mile car, but I keep it running with good maintenance and all you who are kind enough to keep us all updated on your finds.
Posted on Apr 07, 2011
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