Stuart,
You should hear the fan, even with everything off.  On a hot day in a
parking lot the fan will be running.  Nothing on, just trying to do what it
is told.  I guess it's a good way to know when your above a 126 degree's in
your van.

Stuart wrote:

> Yes, there is a fan in the Dometic.  I finally dug out my manual for my
> Dometic 182 and it says: "....a 0.6 watt ventilator [fan] is switched on
> automatically when the temperature around the condenser fins is about
> 126 F and switched off at 108 F.  The ventilator is connected to the
> twelve volt system."
>
> Unfortunately, in the Vanagon installation the twelve volt system is
> only working when the engine is running!  The fan will not come on with
> gas or 120v AC unless you rewire the system.
>
> No wonder I have never heard it!
>
> Stuart