A/C and fan speeds

[thom4782]

I've read a number of posts about Boxster fan speeds.

With the A/C off, it's clear the fans are off when the coolant temp is below a specific temperature (say T low) and on high speed above a different temperature (say T high). In between T low and T high, the fans run at low speed.

Here's my question. When the A/C is turned on, do the fan operate at low speed immediately even if the engine has not warmed up to T low? my fans operate at high speed when the refrigerant pressure goes above a certain pressure.

I'm asking because either the fans aren't turning on a low speed when I turn on the A/C or they are on but I can hear them above the engine noise. I don't have a tool to test the fan operations directly.

Thanks