[Vwdiesel] Diagnosis help/confirmation needed

[Frank G. Pival]

When my coolant was low...nothing..naughta..the a/c guy told me about on 
this 96 Passat if the charge is just a bit down the compressor ..it no 
workee...so he recharged it fully and voila...it works like Lou Graham 
singing COLD AS ICE!
Hope that helps

Frank

On 7/23/2013 9:52 PM, lbaird119 at aol.com wrote:
> Patient:  1996 Passat TDI Wagon
>
> Symptom:  Low pressure differential between high and low sides of A/C
>
> Treatments Tried:  New expansion valve - no change, compressor transplant from a Jetta donor - no change or even less pressure differential.
>
> Concerns:  Was told that about this era, the compressors went to a variable compressor so a non fully charged system will yield nearly no pressure differential.  Do not believe this is a variable output compressor though.  Anybody know for sure?
>
> Tests other than a variant of a sphygmomanometer, was to seperate the lines from the expansion valve and do a physical "feel" of the suction and pressure from the compressor.  Light pressure from my pinkie held back the pressure from the compressor.
>
> Diagnosis:  I feel that I had a compressor go bad and Murphy came through and made sure I got another one with pretty much the same problem.  Before I order another one, I just wanted to get a consensus on my diagnosis or if someone sees something I missed...  When it's obvious what the problem is, and it's the same problem you just fixed, I get a little leary that I'm missing something.
>      Loren
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