[s-cars] AC high pressure switch

Joshua Van Tol josh at spiny.com
Tue Jul 15 05:27:54 PDT 2014


What makes them think the problem isn't real? The switch is likely normally
closed, so that it can be wired in series with other protection devices.

If the symptom is the AC works fine when the car is at speed, but sometimes
quits right after start up or when in traffic, then I think you need to
look at reasons why you might not be getting enough condenser airflow.

Is the aux cooling fan working? If it is, is the viscous clutch on the
engine driven fan worn out? Last but not least, the condenser might be
plugged up with bugs.

My S6 had a worn out barely working aux cooling fan, and the viscous clutch
was worn. Replacing both fixed the AC. Cooling of the engine was not
affected.




On Mon, Jul 14, 2014 at 3:39 PM, Erik Addy <erikaddy at yahoo.com> wrote:

> So my AC is sometimes not working, throwing a code for the high pressure
> switch.  Shop says pressures are good, think it's an electrical issue.  Can
> any one tell me the location of the switch, and if open or closed circuit =
> high pressure cut off?
>
> Thanks!
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