75/82 is below ideal operating temps.  The fan will kick on a lot to keep it
at that temp if you don't change your thermostat.  Unless you want to change
the temp on the switch, I wouldn't  put a new one in, you won't gain
anything.  85/93 is a good one.

>From: robert shawn feller <carboncow@GMAIL.COM>
>Reply-To: robert shawn feller <carboncow@GMAIL.COM>
>To: vanagon@GERRY.VANAGON.COM
>Subject: buying cooling fan thermo-switch, which one do you recommend?
>Date: Wed, 28 Jun 2006 00:37:31 -0400
>
>I live in Ohio so hot summers and average winters and am replacing my
>radiator this week. Going to do the fan switch since they are only
>$11.00. Bentley says my current switch should kick on at 89-94C and
>the 2nd stage should be at 95-100C. Currently I only ever get the
>first stage even when driving in Florida this spring. 2nd stage does
>work but never kicks on.
>
>Anyways BD sells a low temp and a somewhat normal temp fan switch.
>Does anyone have a pro/con to the low temp switch at 75-70/82-77c vs
>their 85-74/93-82c, the later being closer to stock. Even their high
>tem pswitch is 3-5c below Bentley
>
>--
>shawn feller, ohio
>1986 vw vanagon gl westfalia
>1993 vw eurovan gl
>plus a couple of saabs, boats, jet skis, dog and wife (all require to
>much maintenance, accept the dog)...
>
>www.carboncow.com
>www.carboncow.net