RE: rpm's shot up w/defogger on?

[Chris Coracini <Coracin@usdl.com>]

it could be that your compressor is not engaging.  i took the A/C out of
mine, but when i use defrost, the rpms go up to 1500, because the engine
is not loaded by the compressor but the idle compensation thingy still
does it's thing.  so next time it shoots up like that, go check and see
if the compressor is engaged.  (you can tell because the inside will be
turning.  if it isn't engaged, the inside will be static while the
outside turns.)  it could be low on freon or have a bad connection
somewhere...

chris
86 16V scirocco

> -----Original Message-----
> From:	Neal Tovsen [SMTP:ntovsen@piper.hamline.edu]
> Sent:	Saturday, February 13, 1999 2:23 AM
> To:	Rich Zuk; Scirocco-L
> Subject:	RE: rpm's shot up w/defogger on?
> 
> Your a/c compressor should come on with the defrost. A lot of cars
> with a/c do this, 'cause the a/c takes moisture out of the air making
> the defroster more effective. Supposedly, if your a/c isn' t charged,
> it's supposed to recognize this and not turn the compressor on, but
> maybe there's something else that still requires more vacuum and/or
> more elect. current?? My 87 would seem to be out of charge, too, but
> it does the same thing.
>  
> Neal
> 
> 	-----Original Message-----
> 	From: Majordomo [mailto:majord@neubayern.net]On Behalf Of Rich
> Zuk
> 	Sent: Friday, February 12, 1999 11:00 PM
> 	To: Scirocco List
> 	Subject: rpm's shot up w/defogger on?
> 	
> 	
> 	88 16V
> 	I turned on the front defrost/defogger to get rid of fogged
> windows, not the heat, and the rpms went from idle 900 to 1800rpms
> constant.   What's this all about?  I turn it to heat, it's okay. 
> Back to defrost, the idle went shooting up again.  The car does have
> a/c, but most likely not charged.   All was fine before.  First time
> this happened.   TIA
> 	 
> 	Peace
> 	Rich Z
> 	88 16V
> 

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