Welcome to the North American Subaru Impreza Owners Club Saturday November 29, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Service & Maintenance

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 11-10-2001, 12:54 PM   #1
aschnell
Scooby Newbie
 
Member#: 1068
Join Date: Mar 2000
Location: NH
Vehicle:
2008 STI
OBP

Default Disable A/C on Defrost?

Anybody disable the automatic A/C turn on with defrost in the WRX.

I would assume there is a switch in the climate control console?

Anybody do this, it is kind of annoying to have it turn on all the time in defrost.
* Registered users of the site do not see these ads.
aschnell is offline   Reply With Quote
Old 11-10-2001, 12:58 PM   #2
tulit
Scooby Specialist
 
Member#: 338
Join Date: Sep 1999
Chapter/Region: E. Canada
Location: Toronto
Vehicle:
09 STi
White

Default

Thats how the defrost works. By turning on the AC... "Dries" the air.
tulit is offline   Reply With Quote
Old 11-10-2001, 01:07 PM   #3
aschnell
Scooby Newbie
 
Member#: 1068
Join Date: Mar 2000
Location: NH
Vehicle:
2008 STI
OBP

Default

On older vehicles the driver had to decide if he wanted it on or off. In order to clear the windshield you dont have to turn on the AC. On humid day it helps but you dont always need it.
I want control.
aschnell is offline   Reply With Quote
Old 11-10-2001, 02:10 PM   #4
HndaTch627
Scooby Guru
 
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default

on a humid day?? get a few people in the car and breathing and see how quickly the windows fog.

Jeremy
HndaTch627 is offline   Reply With Quote
Old 11-10-2001, 05:47 PM   #5
gargleblaster
Scooby Specialist
 
Member#: 11107
Join Date: Oct 2001
Chapter/Region: RMIC
Location: Rky Mtn High
Vehicle:
2015 WRX STi
Crystal White Pearl

Default

Quote:
Originally posted by aschnell
On older vehicles the driver had to decide if he wanted it on or off. In order to clear the windshield you dont have to turn on the AC. On humid day it helps but you dont always need it.
I want control.
Agreed. The driver should be able to kick the a/c on by hitting the... a/c button. Subaru should put a blurb in the owners' manual about running the a/c to control fogging, and then leave the control to the driver. This is what Honda/Acura, VW/Audi, and I'm sure many other companies do.

So, has anyone defeated the auto a/c?
gargleblaster is offline   Reply With Quote
Old 11-10-2001, 05:57 PM   #6
ylexot
Scooby Specialist
 
Member#: 6878
Join Date: May 2001
Location: St Inigoes, MD, USA
Vehicle:
2002 MBP 2.5RS
1994 GMC Sonoma

Default

I'd like to know how to do this too. Cold air may be drier, but it actually fogs the windows in most conditions. Fogging windows are caused by condesation on the glass (warm/humid air, cold glass). I've always found that hot air clears them the fastest if you can stand the hot air.
ylexot is offline   Reply With Quote
Old 11-11-2001, 10:34 AM   #7
fourortwowheels
Guest
 
Member#:
Default

The auto AC on mode also works with the floor/def setting. This is annoying to me as I like to use the floor and def. dash vents for general ventilation. I dont usually want the comp. on in that mode.
  Reply With Quote
Old 11-11-2001, 12:04 PM   #8
yamarocket630
Scooby Specialist
 
Member#: 9436
Join Date: Aug 2001
Chapter/Region: MWSOC
Location: My member# is lower than yours
Vehicle:
05 Saab 9-5 Aero

Default

The easiest way would be to put an inline switch to the compressor clutch wires.
yamarocket630 is offline   Reply With Quote
Old 11-11-2001, 12:19 PM   #9
fourortwowheels
Guest
 
Member#:
Default

It would be nice to to tie that into the A\C button. Im sure its not too diffuclt
  Reply With Quote
Old 11-14-2001, 10:31 PM   #10
Alan
Scooby Specialist
 
Member#: 3601
Join Date: Jan 2001
Chapter/Region: NWIC
Location: Tigard, Oregon
Vehicle:
2006 WRX Wagon
BRIGHT BLUE!

Angry Not easy..

I've also looked into doing that modification, but the switching is inside the fairly well sealed heat control panel. Removing the control panel is somewhat a pain since one need to then reconnect and adjust the cables that run the air doors. Then one would have to get inside the panel and find the connection that is made when the control is rotated to the defrost position. Sigh.
Alan is offline   Reply With Quote
Old 11-18-2001, 04:44 PM   #11
lophilip
Scooby Newbie
 
Member#: 8576
Join Date: Jul 2001
Vehicle:
2000 TS Impreza Seda
Silver

Default easiest way

For get about the wires to the magnetic clutch. Just pull the fuse to the AC! The AC will never turn on once that happens!
lophilip is offline   Reply With Quote
Old 11-18-2001, 05:31 PM   #12
Vineet Singh
Scooby Newbie
 
Member#: 8936
Join Date: Aug 2001
Location: Naperville, IL
Default

For a reference point, 1g Talons (DSM) had the manual control, 2g Talons (DSM) had automatic.

On the 2g's, there is a microswitch on the knob assembly, all you need to do is disconnect this, but not sure if the suby works the same way.

I don't mind it. If I get too cold AND it's fogging up in the windows, I just turn the temp dial to warm or hot, turn on defrost, and poof, it's gone! (the fog) It's still nice and toasty on cold days.
Vineet Singh is offline   Reply With Quote
Old 11-18-2001, 06:13 PM   #13
fourortwowheels
Guest
 
Member#:
Default Re: easiest way

Thats the best short term Fix. Its winter now so I dont need the AC on unless of course its raining hard and really humid out....

Im pulling the fuse untill a good permenant fix comes along.

lophilip
Just pull the fuse to the AC! The AC will never turn on once that happens!
  Reply With Quote
Old 11-18-2001, 06:44 PM   #14
Vineet Singh
Scooby Newbie
 
Member#: 8936
Join Date: Aug 2001
Location: Naperville, IL
Default

OTOH, running the A/C through winter helps keep the seals in your A/C system/compressor/rubber-joints fresh and lubricated at all times. During winter, seals may shrink/harden if the PAG or POE oil (or whatever lube is used) settles due to less use.

In cars with A/C that comes on with defrost, (at least with what cars I have dealt with), the A/C in general seems to last much longer (10+years vs 6 or less years). May not be an issue since R134 is so cheap, but still, lubrication is a good thing (and compressors are not cheap)
Vineet Singh is offline   Reply With Quote
Old 11-25-2008, 04:58 PM   #15
snake2332
Scooby Newbie
 
Member#: 173313
Join Date: Mar 2008
Location: Missoula, Montana
Vehicle:
2004 WRX (stage 2)
Black Java Pearl

Default

Can we bring this thread back from the dead to see if anyone knows how to make the A/C not come on automatically with defrost (other than pulling the fuse)? I would like to still use A/C with defrost manually via the A/C button if possible, but generally I know that just air blowing on the windshield will keep it from fogging and I don't like the performance loss from the A/C running. I know Alan said it's not easy. Maybe someone has an easy was to do it since it's been 7 years since this thread has been updated (it was the first one to come up when I googled nasioc for this).
snake2332 is offline   Reply With Quote
Old 11-25-2008, 05:35 PM   #16
2bluewagons
Scooby Newbie
 
Member#: 58475
Join Date: Mar 2004
Chapter/Region: NWIC
Location: portland, or
Vehicle:
2004 WRX Wagon
WR Blue

Default

I did this on my 04 wrx and it was about as easy as it looks, just have to remove radio and loosen center console to be able to move around (not quite remove) the center panel. There is a mechanical switch that engages when the climate control selector is in either of the 2 defrost modes. Remove those purple wires and you can choose when to engage ac.

http://www.scoobymods.com/forums/sho...hlight=defrost

BTW, I don't imagine this will be the same for MY05+ when they went electronic with the climate control, so good luck!
2bluewagons is offline   Reply With Quote
Old 11-25-2008, 05:35 PM   #17
Hiflyer731
Scooby Newbie
 
Member#: 30307
Join Date: Nov 2002
Chapter/Region: SCIC
Location: SoCal, RSM
Vehicle:
2008 FXT

Default

On my 03 WRX there is microswitch that is activated when you move the distribution knob to the defrost setting. I simply removed the trim around the controls and cut out the switch. Now the AC compressor is turned on only when i press the AC button. It took about 20 min to do the whole thing. I have manual controls, I'm sure it is not that simple on cars with automatic environmental controls.
Hiflyer731 is offline   Reply With Quote
Old 11-25-2008, 06:37 PM   #18
snake2332
Scooby Newbie
 
Member#: 173313
Join Date: Mar 2008
Location: Missoula, Montana
Vehicle:
2004 WRX (stage 2)
Black Java Pearl

Default

Awesome, thanks guys! This is the only WRX site that isn't blocked for me at work so really, thanks a bunch.
snake2332 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Possible to disconnet auto A/C on defrost? Dex Electrical & Lighting 8 03-13-2008 08:21 AM
IT peope: Disabling SMTP service on IIS on XP box cwb124 Off-Topic 79 04-26-2006 04:20 PM
HVAC controls stuck on defrost Streetman Electrical & Lighting 2 10-01-2004 06:01 PM
HVAC controls stuck on defrost Streetman Interior & Exterior Modification 0 10-01-2004 04:59 PM
Sti - Kill the AC on defrost? WRX-72 Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 12 10-22-2003 12:11 PM


All times are GMT -4. The time now is 02:43 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.