The rad fan is triggered by the AC on most vehicles.
Check the wiring diagrams to confirm.

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
TCollins
Sent: Thursday, May 01, 2014 11:56 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Radiator fan switch wierdness

I wondered about that too. Since the fan does trigger from time to sporadic
time.

Would any other switch trigger radiator fan operation?

> On May 1, 2014, at 11:22 AM, "Project Pat" <psdooley@verizon.net> wrote:
>
> Just a wild guess, you may want to take it out and check for buildup.
> Junk on the coolant side of the switch could insulate it and cause delayed
> reaction.
>