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AC blowing threw Defrost Vents?

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Old 07-20-2019, 08:29 PM
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Default AC blowing threw Defrost Vents?

So I’ve checked the lines around the intake and there all good. The pcv valve was a little loose but I clapped it back up tight. The small line coming from the intake manifold is still connected an the check valve has all 3 lines still connected with no visible damage. The valve it’s self it pretty dry looking but like I said from what I can see there is no visable cracks. Would you lead towards the actuall switches them self’s?
Old 07-20-2019, 10:47 PM
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Mine did this but it had a bad vacuum leak at the 3 way check valve. You have to have a leak somewhere
Old 07-21-2019, 01:05 PM
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Originally Posted by LS1 pwrd NOVA
Mine did this but it had a bad vacuum leak at the 3 way check valve. You have to have a leak somewhere

Well i I checked with autozone and they don’t have it In stock so I’m going to go to Advanced Auto to get it, hopefully it’s the one.




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