Your mechanic does not seem to be up to speed. Did he check if there is
voltage going to the A/C clutch coil?

What does he mean when he says "thinks I have low output on the
alternator"? Did he measure it, or is he just guessing at problems?

Unless you are prepared to work on this yourself, I think you should
find yourself a better mechanic. If you post where you are located you
can probably get some good recommendations in this NG.

When did the warranty expire on the car?

TomM in NY wrote:
>
> I have been having trouble with the AC in my Civic. The tech replaced both
> pressure switches then the Electric Load Detector because he got a code that
> the ELD was not working right. The problem is the compressor doesn't engage
> about 50% of the time. I get air blowing but not cold. Now he is telling me he
> thinks I have low output on the alternator...
> I get a terrible buzz on my am radio when the compressor does engage.
> Any ideas?