Date:         Fri, 18 Mar 2005 13:15:09 -0600
Reply-To:     Al and Sue Brase <albeeee@MCHSI.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Al and Sue Brase <albeeee@MCHSI.COM>
Subject:      Re: Radiator Fan Turns On But Not Off
Comments: To: Bruce Nadig <motorbruce@HOTMAIL.COM>
In-Reply-To:  <BAY103-F31D737D5B7270BA447464FC74A0@phx.gbl>
Content-Type: text/plain; charset=us-ascii; format=flowed

Sometimes, over fill of freon will keep the fan on. (a switch on the
high side line turnsi it on as soon as the compressor starts.
Al Brase

Bruce Nadig wrote:

> Howdy From Texas,
>
> I've been off the list since mid-December - out of town and away from
> e-mail. I've missed ya'll. It is good to be back.
>
> I have an unusual problems on my '87 GL. The "radiator" fan will turn on
> when triggered by the thermo switch or the a/c, as it should. However,
> once
> it comes on - and it has always come on in the high speed mode - it stays
> on, no matter what. It will stay on until the there is no more power
> available. It will run long after the ignition has been turned off.
> The fan
> runs until it drains the battery or until the battery is disconnected.
>
> As some background, the van did sit undriven for about 16 months while
> I was
> doing an engine conversion to an '87 Porsche 911 Carrera 3.2 liter
> engine.
> The radiator and its thermo switch are no longer a factor. Instead I
> have an
> oil cooler with a thermo switch that behaves as the radiator thermo
> switch
> does (except it is on/off instead of off/low/high).
>
> The thermo switch shouldn't be the problem as I have started the fan
> using a
> jumper wire with the thermo switch disconnected. Once the jumper is
> removed
> the fan remains on high. When the A/C is switched on, the fan will
> also be
> switched on and will remain on until the power is disconnected.
>
> Without having investigated very far, I am guessing that there may be a
> problem with the control unit that powers the fan on and off. I assume
> that
> this control unit is a simple relay, but I'm not sure. The Bentley manual
> isn't specific. Where is this control unit/relay located? Is it behind
> the
> panel at the left rear of the van?
>
> Any and all help is greatly appreciated.
>
> Cheers,
> Bruce
> motorbruce@hotmail.com
>