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#1
05-23-2011, 07:55 PM
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Another HVAC problem
So everything was working great earlier this spring when I checked it all out.
For some reason now when I switch to Max A/C it switches to defrost only. Or sometimes I will get a little air through the vents but mostly through the defrost. The odd thing is when it is just on A/C it works fine. All other settings seem to be fine as well. Any thoughts? Could this just a vacuum leak? I did replace lines up near the accumulator last winter. The new line is squished too if that brings up any light bulbs. Almost forgot; '95 4x4 Blazer. Thanks in advance for the tips. Joules 
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#2
05-24-2011, 10:13 PM
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Re: Another HVAC problem
Check the vacuum line, (and the actuator) for the recirculate door. Just above passenger feet and has a black plastic grille over it. Might have to remove the kick panel to get at the actuator.
__________________
You have to know how it works, to figure out why it doesn't.
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#3
06-12-2011, 07:36 AM
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Re: Another HVAC problem
After much searching on other Blazer forums I have confirmed what my problem is.
The vacuum switch in the transfer case is bad causing tranny fluid to be sucked up into the selector. Apparently since I just recently tested out 4Lo that's when the problem started.
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