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loud humming noise at idle when A/C is on...

7K views 9 replies 9 participants last post by  Smoke1991 
#1 ·
anyone have this issue during full stops or at slow speeds?
 
#2 ·
Mine does it very faintly, so I suspect it will get worse. I think it's an expansion valve that goes bad.
 
#4 ·
I've had the "growl" at idle with the A/C on for a long time now. I assume it is the compressor but it is still working even in the Florida heat.
 
#6 ·
I have the same humming sound when I am at a stop light or junction. I have a 2013 sonata 2.0T. if I switch the AC off the noise goes away. I can also feel it through the brake peddle, only slight but it is there.
Did you find out what it was and how to fix it?
Any help would be great
 
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