Question about 2000 Lincoln LS

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Air conditioning is blowing out hot and cold air

Air conditioning started blowing out hot and cold air at same time now is only blowing out hot air anybody have any ideas on what is wrong

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It sounds like the dual climate control valve. It is supposed to close the valves when the a/c is turned on, but they get stuck sometimes. I have already replaced 2.

What happens is the valves get stuck and the engine heat will blow over the cool air making it feel warm, even though the a/c is working fine.

If it started out on one side of the car cooling better than the other than you can almost bet this is the problem.

They will be called a heater control valve by most auto parts stores. I think the part is Motorcraft YG378.

Another way to make sure this is the problem is to find the dccv and clamp the two top black hoses with pliers or something and see if the car gets cooler. It will still not get cold but this will let you know if the dccv is the problem.

Posted on Jun 09, 2010

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A few issues come to mind:

Freon Leak
Faulty Heatercore
A/C compressor not mixing properly
not enough coolant through the lines

Posted on Jun 03, 2010

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