[Butters13]

So my ac compressor clutch always appears engaged, even with the ac off. I was told that I have an internal clutch, which is why it appears engaged from the outside. Is there any truth to this or is the compressor bad? I can’t find any related info on the forum or web, and I’m trying to diagnose my failing ac at idle.

2012 optima ex 2.4L

 

[Turbonut]

Assume your speaking of the 2011 and newer, but there is no clutch, internal nor external, but there is an electronic control valve at the rear of the compressor and in layman's terms, it's job is to increase/decrease piston displacement depending on demand. As you have found, the a/c internals are turning all the time, even when the a/c is off.

Want more info look up variable displacement compressor as there are some unique features not found on the external clutch compressor.

 

[Butters13]

Thanks Turbonut, I appreciate it very much!