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I know I've seen this discussed here before but I can't find it! I noticed the a/c wasn't cooling quite as well as it had been, then the next day ( of course the hottest day here so far, Arizona ) it wasn't cooling at all. So of course I added a can of freon! Well, it blows cold on the passenger side and hotter than Arizona on driver side. Haven't checked rear vents yet, going out to do that now. Any ideas where I start checking first???
 

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Sounds like a temp actuator.
Try a reset (look for a YouTube vid), if that doesn't work, you may need a new actuator.
 
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