[s-cars] An A/C question

[Charlie Smith]

Earlier, Djdawson2 at aol.com wrote:
>
> My A/C is actually working fine (a 134a system, 93 S4)... however,
> out of curiosity, I was going to measure my high and low side
> pressures, and see if the charge was up to snuff.  Interesting
> thing is, I can't seem to locate a low side port.  The high side
> is clearly accessible on the passenger side of the condenser, but
> in tracing the low side line from the evaporator down along the
> firewall, into the engine compartment, through the dryer and back
> to the compressor, I see no low side port.
>
> Am I missing something here, or is the low side port located
> behind the cash register at my local Audi dealer?

It's behind the cash register.  I like that.

I remember something about behind a pressure sensor that's in the
system, but that doesn't exactly make sense.  I'd think it would
be the high side that would have a pressure sensor?

I do know there's no sight glass.  You are supposed to evacuate
the system and put in exactly the right amount of 134a by weight,
there's no easy way to check & top up the system.

    - Charlie


  Charlie Smith   charlie at elektro.cmhnet.org  614-471-1418
  http://www.elektro.com/~charlie      Columbus Ohio   USA
  http://www.elektro.com/~audi     photos & technical info

  95 S6 Quattro  -  24 PSI, RS2 6 speed, and other features
  97 Dodge Ram   -  40 PSI, 4x4 w/Cummins turbo diesel