Good suggestion, but this can't be the culperit in my case. It behaved this
same way before I had the A/C charged (the system had been completely
empty).

Any other suggestions?

Cheers,
Bruce
motorbruce@hotmail.com

>From: Al and Sue Brase <albeeee@mchsi.com>
>To: Bruce Nadig <motorbruce@HOTMAIL.COM>
>CC: vanagon@GERRY.VANAGON.COM
>Subject: Re: Radiator Fan Turns On But Not Off
>Date: Fri, 18 Mar 2005 13:15:09 -0600
>
>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
>>
>