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Old 10-02-2010, 09:22   #1 (permalink)
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2002 Lincoln Navigator A/C problem

I have a 2002 Lincoln Navigator my A/C has been malfunctioning, when I turn my truck on and turn the A/C on, it works fine, When I start to drive and accelerate is when the A/C shifts from blowing from the vents to blowing out the defrost vents and sometimes shifts back to vents and back and forth it shifts with acceleration, any help appreciated Thank You.
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Old 10-02-2010, 10:55   #2 (permalink)
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Re: 2002 Lincoln Navigator A/C problem

Is it 2wd or 4wd model? There have been a few posts regarding vacuum leaks causing this problem. Look at a few of the older posts and see if that fits your situation.


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Old 10-02-2010, 14:27   #3 (permalink)
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Re: 2002 Lincoln Navigator A/C problem

Its a 2WD, im goin to search the forums see If I find anything, Thanks all help is really appreciated, Thanks evryone
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Old 10-02-2010, 22:41   #4 (permalink)
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Re: 2002 Lincoln Navigator A/C problem

Quote:
Originally Posted by 02 NAVIGATOR View Post
I have a 2002 Lincoln Navigator my A/C has been malfunctioning, when I turn my truck on and turn the A/C on, it works fine, When I start to drive and accelerate is when the A/C shifts from blowing from the vents to blowing out the defrost vents and sometimes shifts back to vents and back and forth it shifts with acceleration, any help appreciated Thank You.
Hi, this is a common thing on Ford products. You either have a vacuum leak or a bad check valve. Older cars had a replaceable check valve, [you could put one in line] and the newer Fords have the check valve built in to the vacuum canister.
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