Windshield fan without AC??
Burning Brakes
Joined: Jul 2013
Posts: 1,008
Likes: 57
From: Kensington MD
I have the same issue. I was told that's just the way it is--AC comes on to help dehumidify the fog on the windshield. My other issue with the system (also supposedly the way it's supposed to work) is that the AC comes on when I use the recirculate button. Stupid. I could see that when the HVAC is set on AUTO, but when it's off AUTO, I should be able to select whatever modes I want.
1/4 mile/AutoX
Joined: Jun 2014
Posts: 11,441
Likes: 2,186
From: Buffalo Texas
also with new cars the ac will only run now and then, the compressor will not run all the time, so whatever your issue is it's not going to use more gas if that's what your concern is ????
Last edited by Pounder; Dec 22, 2015 at 10:40 AM.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
From your Owners Manual:
'The air conditioning cannot be turned off in DEFROST and
DEFOG, as it helps to remove moisture from the
vehicle. It also helps to keep the windows clear.'
Mr. Sam
'The air conditioning cannot be turned off in DEFROST and
DEFOG, as it helps to remove moisture from the
vehicle. It also helps to keep the windows clear.'
Mr. Sam
Safety Car
Joined: Feb 2013
Posts: 4,346
Likes: 755
From: Greensboro Nc
There's a very well kept secret about how to make the fan blow on the windshield without the AC being on. It's very simple, but most corvette owners will never do it: drive the car when it's ~35 degrees or less outside. While driving, set the HVAC to blow on the windshield. Notice the AC staying off.
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There's a very well kept secret about how to make the fan blow on the windshield without the AC being on. It's very simple, but most corvette owners will never do it: drive the car when it's ~35 degrees or less outside. While driving, set the HVAC to blow on the windshield. Notice the AC staying off.
Otherwise, the A/C comes on when the defroster is selected.
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Pro
Joined: Jul 2010
Posts: 590
Likes: 57
From: Aurora Colorado
And it works very well like that! Quick AC aided defrost is a good thing-especially in high humidity climes. And this also exercises the compressor and keeps the seals lubricated during off season.
No way to get the AC compressor to come on when the ambient temperature is too cold usually-starting at 55 degrees or so- has been this way on all of my vehicles-my C5 inclusive.
No way to get the AC compressor to come on when the ambient temperature is too cold usually-starting at 55 degrees or so- has been this way on all of my vehicles-my C5 inclusive.
Last edited by phoneman91; Dec 23, 2015 at 12:31 AM.
Burning Brakes
Joined: Jul 2013
Posts: 1,008
Likes: 57
From: Kensington MD
That doesn't explain the forced AC on recirc. The manual says:
What if there is no fogging? You're still stuck with AC on recirc.
Operating the system in the recirculation mode may cause fogging of the vehicle’s windows when the weather is cold and damp. To clear the fog, switch the system to either the defog or defrost mode and increase the fan speed. To avoid re-fogging of the windows, operate the system in the outside air mode.
Drifting
Joined: Apr 2008
Posts: 1,355
Likes: 139
From: Surprise AZ
FWIW, I was told that part of the reason was that people would go a whole season and never turn the AC on. Things like seals would dry up and then when warm weather returned the system would fail. So that coupled with the fact that it dries the air...
Safety Car
Joined: Sep 2000
Posts: 3,572
Likes: 420
From: Taildragers rule! USA1
Where have you guys been? All GM cars since about 1975 have the AC compressor run automatically with defrost. It is a good thing. If you don't like it, drive to somewhere less than about 35 degrees F and it will turn the compressor off.