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A/C Vent Temperatures #4471360
07/26/17 07:26 PM
07/26/17 07:26 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline OP
Merkava_4  Offline OP
Joined: Jan 2007
Posts: 17,501
Clovis, CA
2000 Buick LeSabre 3800 V6
From left to right:
Vent 1 78*F
Vent 2 77*F
Vent 3 46*F
Vent 4 51*F
Outside ambient air temperature 100*F.

Low on charge maybe ?
What you guys say ?
Time to buy A/C gauges ?

Re: A/C Vent Temperatures [Re: Merkava_4] #4471363
07/26/17 07:31 PM
07/26/17 07:31 PM
Joined: Nov 2008
Posts: 9,301
Phoenix
dishdude Offline
dishdude  Offline
Joined: Nov 2008
Posts: 9,301
Phoenix
Driver side blend door isn't closing.


2018 Challenger SRT 392 PUP 0w-40 Wix 57899XP
2018 GTI
Re: A/C Vent Temperatures [Re: Merkava_4] #4471364
07/26/17 07:31 PM
07/26/17 07:31 PM
Joined: Sep 2016
Posts: 524
Fairfax, VA
TinyVoices Offline
TinyVoices  Offline
Joined: Sep 2016
Posts: 524
Fairfax, VA
Why are 2 vents so much cooler? Which are hot and which are cool?

Saw your edit. And agree with above poster.

My mr2 blows about 48f at 100 degree external temp last I topped the system up.

Last edited by TinyVoices; 07/26/17 07:32 PM.

2010 Mazda RX8 Sport - 37k miles - ????
2006 Toyota Matrix XR AWD (Wife) - 130k miles - Valvoline Max Life 5w30
Re: A/C Vent Temperatures [Re: dishdude] #4471367
07/26/17 07:35 PM
07/26/17 07:35 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline OP
Merkava_4  Offline OP
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Originally Posted By: dishdude
Driver side blend door isn't closing.


Would that also explain why the two driver vents aren't blowing air as hard as the two passenger vents ?

Re: A/C Vent Temperatures [Re: dishdude] #4471377
07/26/17 07:53 PM
07/26/17 07:53 PM
Joined: Feb 2013
Posts: 11,100
Phoenix, AZ
Nick1994 Offline
Nick1994  Offline
Joined: Feb 2013
Posts: 11,100
Phoenix, AZ
Originally Posted By: dishdude
Driver side blend door isn't closing.
+1 GM blend door motors to bad all the time.

Might need refrigerant level checked too, my Sonata was 40 degrees out the vents at 107+ while on the freeway today.

Originally Posted By: Merkava_4
Originally Posted By: dishdude
Driver side blend door isn't closing.


Would that also explain why the two driver vents aren't blowing air as hard as the two passenger vents ?


Might be another bad motor, the "mode door actuator" going bad. Not 100% sure though.


2015 Hyundai Sonata 2.4L 89k Motorcraft Synthetic Blend 5w30 & OEM
2000 Toyota Camry 2.2L 231k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: A/C Vent Temperatures [Re: dishdude] #4471400
07/26/17 08:26 PM
07/26/17 08:26 PM
Joined: Feb 2010
Posts: 4,838
Central Texas
sleddriver Offline
sleddriver  Offline
Joined: Feb 2010
Posts: 4,838
Central Texas
Originally Posted By: dishdude
Driver side blend door isn't closing.
+1
May be the motor or the end of the plastic shaft could have broken. Also be sure that the fresh air on the two warm outlets is OFF.


1998 Volvo V70 T5 228,880 mi. Original Owner.
M1 10W-30 HM
"It's never a mistake to buy tools, defined broadly. They're not a cost, they're an investment." - J.B. Peterson
Re: A/C Vent Temperatures [Re: Merkava_4] #4471467
07/26/17 09:45 PM
07/26/17 09:45 PM
Joined: Jun 2003
Posts: 17,837
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,837
Deplorable in apple valley, ca
Those cars blow cool on one side and warm on the other if the charge is low.


02 Wrangler carlube 5w30
87 F250 traveler 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: A/C Vent Temperatures [Re: Merkava_4] #4471496
07/26/17 10:21 PM
07/26/17 10:21 PM
Joined: Feb 2016
Posts: 170
NY
fcjeep Offline
fcjeep  Offline
Joined: Feb 2016
Posts: 170
NY
I had that same problem on my Jeep a few years back. 2 drivers side vents blew cold but 2 passenger vents blew warm. All it needed was a partial charge.

And I still can't figure why all the vents weren't warm instead of 50/50.


2006 Jeep GC 4.7L, Died @ 153059 mi frown
2008 Xterra 4.0L, 104500 mi
2016 Jeep GC 3.6L, 19100 mi
2017 Benz C300 14000 mi
Re: A/C Vent Temperatures [Re: Nick1994] #4471502
07/26/17 10:30 PM
07/26/17 10:30 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline OP
Merkava_4  Offline OP
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Originally Posted By: Nick1994
Might be another bad motor, the "mode door actuator" going bad. Not 100% sure though.


There's 3 blend door actuators:
1. Mode Door Actuator
2. Air Mix Actuator
3. Air Inlet Actuator

So far the only one I've replaced is the Air Inlet Actuator; that was when I wasn't getting any warm air at all. So this time I'm guessing it's one of the other two, unless Chris142 is right about it needing a charge.

Re: A/C Vent Temperatures [Re: Chris142] #4471534
07/26/17 11:26 PM
07/26/17 11:26 PM
Joined: Aug 2010
Posts: 12,910
Northern Kentucky
901Memphis Offline
901Memphis  Offline
Joined: Aug 2010
Posts: 12,910
Northern Kentucky
Originally Posted By: Chris142
Those cars blow cool on one side and warm on the other if the charge is low.


Yep my Century does the same thing. It could also be the blend door too


2012 Chevy Cruze LT 1.4T - 59k - Edge 0w30 SL + Mahle OX401D
2002 Buick Century 144k - Built 4T65e(Maxlife) - GTX 5w30 + Fram XG3980
Re: A/C Vent Temperatures [Re: Merkava_4] #4471539
07/26/17 11:47 PM
07/26/17 11:47 PM
Joined: Nov 2006
Posts: 20,594
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,594
MA, Mittelfranken.de
The GTP is colder than my ex wife's heart, 36f at vents @95f, this is the same system as your Buick. Try a charge first.


ASE L1, Master. Deutsch Meisterbrief.
Re: A/C Vent Temperatures [Re: Merkava_4] #4471604
07/27/17 05:39 AM
07/27/17 05:39 AM
Joined: Oct 2008
Posts: 19,210
Sunny Florida
SteveSRT8 Online content
SteveSRT8  Online Content
Joined: Oct 2008
Posts: 19,210
Sunny Florida
Originally Posted By: Merkava_4
Originally Posted By: dishdude
Driver side blend door isn't closing.


Would that also explain why the two driver vents aren't blowing air as hard as the two passenger vents ?


There's the answer.

Blend door malfs are common as a car ages...


"In a democracy, dissent is an act of faith."
J. William Fulbright
Best ET-12.79 @ 111 mph
4340 pounds, Street tires
Just like we go to Publix
Re: A/C Vent Temperatures [Re: Merkava_4] #4471674
07/27/17 07:08 AM
07/27/17 07:08 AM
Joined: Jun 2003
Posts: 17,837
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,837
Deplorable in apple valley, ca
Feel the suction line. If its ice cold its a door. If its cool or warm its under charged.


02 Wrangler carlube 5w30
87 F250 traveler 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: A/C Vent Temperatures [Re: SteveSRT8] #4471680
07/27/17 07:13 AM
07/27/17 07:13 AM
Joined: Nov 2006
Posts: 20,594
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,594
MA, Mittelfranken.de
Yes absolutely but his temps are warm also. Google provided this little thread, worth looking at.

https://www.2carpros.com/questions/buick-lesabre-2000-buick-lesabre-no-cooling-drivers-side-only


ASE L1, Master. Deutsch Meisterbrief.
Re: A/C Vent Temperatures [Re: Merkava_4] #4471694
07/27/17 07:23 AM
07/27/17 07:23 AM
Joined: Apr 2017
Posts: 1,481
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline
Joined: Apr 2017
Posts: 1,481
Ontario, Canada
90% of the time, uneven temps are due to low refrigerant. I would be checking that first.


Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
2013 BMW 135i M Sport Edition Castrol 0W40, Redline MTL
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