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1998 Ford Taurus won't switch from Heat to AC

Okay, we tested compressor by jumping it and it works. Blend door actuator has been manually switched from heat to AC. But, AC still won't come on. Any other possible causes? All ideas will be appreciated.

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6ya6ya
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Posted on Jan 02, 2017

harley9701ha
  • 424 Answers

SOURCE: cant find the blend door actuator on 2003 ford f150 super crew

The temperature blend door actuator is located on the right side of the transmission hump under the evap. case. The floor ducts cover it.

Posted on Jun 22, 2009

  • 451 Answers

SOURCE: grand prix 3800 blowing only hot air please help

i had the exact problem with my 2002 pontiac grand prix. i found a broken vacuum line that comes off the back of the engine. this vacuum line runs down the passenger side top wheel well in the engine compartment. it goes behind the battery mounts then traverses into the big wire harness just below the battery. the vacuum hose was broken there under the battery so i couldn't see it without physically tracing where it went. i took a little piece of rubber hose about the diameter of an aquarium hose and reconnected the hose. i now have cool air. you have to remember that this little vacuum hose keeps the climate control does open as well as close them depending on your hot-cold settings. this all occurs from the climate control knob inside the car. hope this helps. a real easy fix too...........phil

Posted on Jun 25, 2009

motor1258
  • 6674 Answers

SOURCE: Ford Taurus Heater won't switch over to AC

I guess first thing to find out is why compressor is not coming on, as without that running you won't get any cool air. May just need a recharge, but I would have that checked out first. If system is low on freon, it won't engage, and if it is low, why, as in where is leak & how much to fix it, would be my first concern.

Posted on Jun 28, 2009

oldfishead
  • 155 Answers

SOURCE: new blend door actuator doesnt operate

had this problem before... recheck part#....is it for EATC or MANUAL...??? eatc on a manual will only go to half way...sounds like they gave you the wrong part....its a pain to replace wasn't it.....hope this helped you...GL

Posted on Jul 06, 2009

  • 4336 Answers

SOURCE: I need t replace the Air blend door actuator on my

This solution is not for a novice. Air flow doors are fragile and easy to damage.

Posted on Sep 07, 2009

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1 Answer

Kia sportage 2008 v6,I've a problem with AC,In hot weather after 30 mins drive loose conditioned air and hot air start blowing although after switching engine off for may be 20 mins; AC start working


Bad blend door actuator is your cause. You need to disconnect the actuator from the blend door and manually check the blend door. One side of the door switches the heat and one draws air from the ac evaporator.

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In all modern cars there is a tiny DC electric motor driven gear drive that moves a plastic door that blends heated and cooled air from the AC and the heater core, this is called (interestedly enough) the air temperature control blend door actuator. The motor that moves this door fails because the door starts sticking from warping, most common complaint is no heat but it can be no AC as well. To replace these parts (blend door and blend door actuator) you must remove the entire dash from the car. Always have this problem confirmed by a dealer or qualified repair shop as it is a very expensive repair.

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Sounds like it could be the blend door motor that has failed or the blend door itself is stuck or broken. If you have manual A/C controls it could also be the potentiometer(the switch that controls the heat) or if you have EATC it might be the complete head unit that needs to be replaced. More than likely it is the blend door motor that needs replacing so that would be where I'd start testing first.

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you need to check the blend door in the heater box it maybe broken or stuck.the blend door switches between the heater core and ac evaporator to provide a mix of temperature

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If yours is making the clicking sound then you blend door actuator is bad

Jun 28, 2009 | 1998 Ford Taurus

1 Answer

Ford Taurus Heater won't switch over to AC


I guess first thing to find out is why compressor is not coming on, as without that running you won't get any cool air. May just need a recharge, but I would have that checked out first. If system is low on freon, it won't engage, and if it is low, why, as in where is leak & how much to fix it, would be my first concern.

Jun 28, 2009 | 1998 Ford Taurus

2 Answers

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Is the heater working? Turn the A.C. off with the car at an idle. Turn the A.C. on and listen for the compressor to turn on. (should hear a click under the hood and the motor should change pitch. If no noise, the compressor is not comming on. The o-rings were bad about leaking on these cars, letting out all the freeon. If there is no freeon, the low pressure switch won't let the compressor run.

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the blend doors inside the system are what makes the heat ac work there are vacuume motors going to each door if the vacuume lines are cracked or broke the doors wont work and they can sometimes stick

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