Gary, only 2.1 models with A/C have 3 speed fans. Speed 2 is controlled
only by the A/C controls and has nothing to do with how hot the engine
or radiator are. The dual temp switch in the radiator runs speeds 1 + 3
according to how hot the radiator is. The A/C relay controls speed 2.

The overall cooling system has plenty of capacity for the 2.1. Many
people run much more powerful engines in Vanagons without cooling system
limitations presenting themselves.

Mark

gary hradek wrote:
>
> David,
>      My disconnect is more obvious.   Sometimes it
> will run 10 or 15 minutes in the hotter area with only
> the low speed fan running.   Othertimes the medium
> speed fan will be running when the temp gauge
> indicates that it should be off.   I think it is just
> a poorly designed system that works marginally.   I
> think the actual coolant flow maybe variable and is
> the cause of the problem.   This is a tuff thing to
> measure but it would explain the temperature
> variations with a constant engine speed.
>