Mine has done it since new. I had the dealer evacuate it and add the proper amount or refrigerant when it was about a week old. I now have 97K miles on it and it still does it.

 

You should hear the Fords at my work there way worse then my Dodge. I was told by a mechanic that is the clutch release if not used for a while they'll stick a bit then release hence the clunk.

 

Mine never made that sound till a few weeks ago, ac was ice cold until one day i noticed a leak, about a drop or 2 (red oily fluid) , watched it and traced it up to the compressor, maybe compressor oil, I know it will leak out gas too with it but i watched my leak for a good 10 days without any difference in cooling.
I have stopped using ac fearing a compressor failure. Haven't played with HVAC before.

Hopefully all your Ac's continue blowing ice

 

Compressor oil is not red, so it is not the compressor. It's tranny fluid or antifreeze.

 

Mine make this clunk from time to time. I was on the FWY yesterday, hit the AC button and heard a clunk. I was loud and scared me. Thought something was coming apart. I just don't want it to put me on the side of the road or go out right after the warantee is up.

This kind of noise on a mechanical part can not be good. I suppose it is good to hear that others have had this issue for a long time and no failure...

 

I think its the crappy compressors dodge puts in these trucks i'm on my third now. Last two lasted a total of 3 months.

 

Nobody else has had any issues with the compressors. Hmmm, sounds like an installation issue to me. They may not have added any oil and prelubed (turned it) it before the install.

 

Wouldn't put it past the dealership.

 

I put guages on mine and it was definately low when I put the refrigerent in. I only had enough refrigerent to barely get the low side where it will actually cool. I have an associates degree in HVAC so I definately know the importance and symptoms of over and undercharged systems. Someone stated something about liquid migrating back to the compressor and that made a lot of sense to me because liquid cannot be compressed and the compressor would definately be strained when it starts. Fortunately, mine has not made the noise that I know of since I posted my story on this forum... Thank-you DTR for fixing yet another problem for another one of your faithful readers.

 

Mine has been doing the clunk since new.

Last weekend I check the AC pressure and found it was at the low end of the pressure operating range for the given ambient temperature, so bumped it up towards the high end of the range (low pressure side). The compressor hasn't clunk since adding the freon (yet)??

MikeyB

 

Mine has done the 'clunk' since new as well, also had the 'churp' at shutdown. When I was at the dealership a couple years ago, I mentioned both - they told me the 'clunk' was normal AC compressor stuff and that there was a TSB for the 'churp', so the fixed the 'churp' by changing out the alternator pulley. I have not had the churp since. Interestingly enough, I haven't had the 'clunk' since either.



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