Sounds like bad radiator thermoswitch and/or relay.

JHL
----- Original Message -----
From: "Christopher Gronski" <gronski@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, September 06, 2005 9:02 AM
Subject: Fan comes on at startup

My rad fan is coming on as soon as I start my van (even if it has been
sitting overnight and cold), could it be the thermosat?

Chris