[Vwdiesel] A/C. Again

[Erik Lane]

One thing that I can think of is that it might be borderline as far as too
much refrigerant in the system. Possibly it's slugging the compressor with
some liquid?

I don't know how likely that is, but it's at least something to think about.


On Thu, May 2, 2013 at 9:10 PM, Shalyn Shourds <sshourds at flash.net> wrote:

> That is, in fact, what's going on.  Appears generally fine if not
> super-cool then after I run it for a bit at RPM, the hammering starts.
> For example, I hear it exiting the highway.  I'd wondered about that,
> but couldn't think why it would be do that.  Only thing I could think of
>  was a bad expansion valve, but I don't really know if they fail that
> way.
>
> I'll try and put the gauges to it tomorrow night.
>
> -Shalyn
>
> --- On Thu, 5/2/13, lbaird119 at aol.com <lbaird119 at aol.com> wrote:
>
>
>   I suppose liquid refrigerant making it back to the compressor could
> "slug" it and make it knock and noy cool well.  That should require it to
> do ok at the start and then the noise pick up as it keeps running.  Not
> enough oil to start with could cause it to start knocking over time I
> suppose.  James prebably has dealt with similar on his equipment at some
> time...  :-)  Gauges and checking for frost or cold lines where they
> shouldn't be can go a long way to diagnosing it.
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