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jockmog
Newbie


Joined: 07 May 2018
Posts: 13



PostPosted: Tue Jun 12, 2018 3:03 pm    Post subject: Driving with no AC Reply with quote

My 996 3.4C2 AC has a leak and, if I understand things correctly the slow speed cooling fans will not run as a result. Is it safe to drive the car in this condition until the leak can be identified and repaired? The high speed on the cooling fans operates as normal
 
  
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Zingari
Donnington
Donnington


Joined: 25 Oct 2009
Posts: 12533
Location: Cheshire

1993 Porsche 964 Anniversary

PostPosted: Tue Jun 12, 2018 3:10 pm    Post subject: Reply with quote

Yes no problem but wear a string vest for ventilation Thumb
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deMort
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Joined: 21 Mar 2015
Posts: 5154
Location: Brighton


PostPosted: Tue Jun 12, 2018 6:56 pm    Post subject: Reply with quote

If you turn the a/c on even if its not working due to no gass the fans will still run at slow speed .. unless theres a fault with them.

On temp then low speed kicks in about 96 degrees and high speed around the 105 degrees mark .
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IanG1
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Joined: 08 Jan 2016
Posts: 96



PostPosted: Tue Jun 12, 2018 8:32 pm    Post subject: Reply with quote

Yes low speed fans run regardless of gas in the system. If they are not working then likely the resistors. Safe to drive? Mine was like this for a while till I changed the resistors. Just make sure they fans run at full when triggered by a hot engine otherwise it will overheat and probably pop your coolant expansion tank
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JTT
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Joined: 11 Nov 2015
Posts: 60
Location: Halifax, NS Canada


PostPosted: Wed Jun 13, 2018 10:21 am    Post subject: Reply with quote

Do these low speed fans ever get noisy? My car has developed a mild "whine" sound after coming up to temp, but it goes away if I turn off the AC.
 
  
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Stoo.c
Monza


Joined: 07 Apr 2014
Posts: 177
Location: Hertfordshire


PostPosted: Wed Jun 13, 2018 10:35 am    Post subject: Reply with quote

Is it definitely coming from the front as it could well be the AC compressor.
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maldren
Österreich


Joined: 07 Oct 2016
Posts: 890



PostPosted: Wed Jun 13, 2018 10:44 am    Post subject: Reply with quote

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2003 996.2 C2 Coupe Arctic Silver
 
  
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Sundayjumper
Spa-Francorchamps


Joined: 17 Mar 2009
Posts: 288
Location: Royal Berkshire

1999 Porsche 996 Carrera 2

PostPosted: Wed Jun 13, 2018 11:48 am    Post subject: Re: Driving with no AC Reply with quote

jockmog wrote:
Is it safe to drive the car in this condition...


The ac on my car has never worked in the 6½ years I've owned it. Engine runs fine.
 
  
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maldren
Österreich


Joined: 07 Oct 2016
Posts: 890



PostPosted: Wed Jun 13, 2018 12:41 pm    Post subject: Reply with quote

What is there to go wrong, you have a pump that is not pumping so it is simply spinning, I guess the bearing could eventually fail but it's less likely that if you were using it.

The cooling fans are now only in use for cooling and so there is less load on them and the other AC parts are effectively passive when not in use.

Mind you, if you don;t have a sun roof it will get very hot in summer and they say this summer will be very hot.....
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Mike
2003 996.2 C2 Coupe Arctic Silver
 
  
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jockmog
Newbie


Joined: 07 May 2018
Posts: 13



PostPosted: Thu Jun 14, 2018 8:57 am    Post subject: Reply with quote

The problem is that the low-speed cooling fans are NOT running and I have a 100 mile trip to the selling dealer to get it repaired under warranty. Replacement resistors have been ordered along with a condenser replacement kit.
 
  
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wasz
Magny-Cours


Joined: 28 Dec 2012
Posts: 2586


1999 Porsche 996 Carrera 2

PostPosted: Thu Jun 14, 2018 12:41 pm    Post subject: Reply with quote

Its no problem, mine ran for ages with duff fan resistors, therfore no low speed fan before I even realised the fans were supposed to run with ac on.

I had AC fine, the fans kicked in full just fine when the coolant got hot.
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jockmog
Newbie


Joined: 07 May 2018
Posts: 13



PostPosted: Thu Jun 14, 2018 6:52 pm    Post subject: Reply with quote

Thanks for all the replies.
Don.
 
  
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