Is your AC connected and working? Belt connected on the A/C compressor? 

----- Original Message -----

From: "Dan N" <dn92610@GMAIL.COM> 
To: "List, Vanagon" <vanagon@GERRY.VANAGON.COM> 
Sent: Friday, October 17, 2014 11:00:02 AM 
Subject: Re: High idle w. A/C on... please help 

thanks Mark... 

on my others Vanagon I get 1200RPM at idle with A/C on and not 2K RPM, I 
think it's too much but 1400RPM is acceptable. 

dan 

On Fri, Oct 17, 2014 at 10:34 AM, mark drillock <mdrillock@cox.net> wrote: 

> The idle is supposed to increase when the A/C is on. There is a wire 
> from the A/C compressor clutch over to the idle control unit so the idle 
> control unit will know to increase the idle speed so the A/C doesn't 
> stall the engine. I don't know what the idle speed rpm increase is 
> supposed to be but maybe someone else does. 
> 
> That year should have the later trinary pressure switch and this could 
> be giving a false indication of a need for medium fan speed. Or maybe 
> someone could have fooled with the wiring to make it do this? 
> 
> Mark 
> 
> 
> Dan N wrote: 
> 
>> hi all, 
>> 
>> 1990' Carat - recently purchased - rebuilt engine - smooth idle 950 RPM - 
>> A/C recently serviced, cold air, new fan switch. 
>> 
>> When I turn the A/C on the idle jumps to 2000 RPM - the fan goes to medium 
>> speed all the time. 
>> 
>> What part or parts that triggers the idle? 
>> 
>> What part or parts that triggers the fan? 
>> 
>> please help -  I search in the archive and only found an April 2000 
>> article 
>> about this.. 
>> 
>> many thanks in advance 
>> 
>> dan 
>> 
>>