[s-cars] A/C strength, 93 S4
JR
audiurs4 at mailforce.net
Wed Jul 26 12:06:40 EDT 2006
What does it mean when the compressor seems to cycle on and off every
few seconds or so? Also, when I press recirc, it just shuts recirc
right back off immediately. It will not stay on recirc.
JR
Ernest Seow wrote:
> The key to good AC is make sure you have sufficient high side pressure when
> you know the system is fully charged. If the low side is too low and the
> highside is too high with the correct charge, then replace the orifice tube
> if you haven't already done so. Its the cheapest part. They tend to clog as
> the car get older from normal debris wear from the compressors. Also
> replacing the accumulator will help also. An old accumulator that is
> saturated will tend to drop efficiency. Over time, moisture still gets into
> the system from the rubber hoses, thats why most AC shop replace them. Also
> make sure your system is running on recirc, and not fresh air, so check the
> flap to make sure it operating. When ambient temps rise above 80+ deg, the
> cooling temp will rise also. There is a chart to check this with Audi/VW
> vehicles. The design drawback of the UrS4/S6 AC is that the AC system is
> placed outside in the plenum, not inside under the dash like newer vehicles,
> so also makes the AC not as cool. I might attempt insulating my AC casings
> as its very hot and humid here in Florida.
> Rgeards,
> Ernest
>
>
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