George,
      I have tried three different thermostats and
they all do the same thing.   Curious that when going
downhill it will cool only to the spot just at below
the halfway mark suggesting that the gauge itself is
working along with the thermostat when no load is
needed.   Gauge will shoot all the way to the top when
it is hot and I am going up a long hill.   Never had
any boilover yet but have alway resorted to using the
heater to cool the engine.  I am thinking there is an
obstruction somewhere in the system or just a tired
engine.   gary
--- THX0001@aol.com wrote:
>
> In a message dated 4/14/04 12:33:45 AM,
> hradek@YAHOO.COM writes:
>
> << Van runs with high speed fan on in a high temp
> range
> but will come down to normal if I turn the heater
> on. >>
>
> Check the calibration of the thermostat.
>
> George

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