Recent Topics
Porsche Panamera buying advice
by CharlieBauer
06/23/18 10:04 PM
RC cars
by red7404
06/23/18 09:36 PM
Any Good 4K Movies ?
by Warstud
06/23/18 09:06 PM
Gray on Oil Dipstick?
by chinee
06/23/18 08:41 PM
Clear plastic scratch remover?
by Quattro Pete
06/23/18 08:15 PM
Parking wars show.
by Chris142
06/23/18 08:15 PM
set for years
by 93cruiser
06/23/18 08:07 PM
Looking to replace 2005 Sienna with SUV
by i6pwr
06/23/18 07:26 PM
Trying to fix chainsaw
by turtlevette
06/23/18 06:48 PM
tire rotation
by marine65
06/23/18 06:48 PM
Reese hitch $30 Walmart YMMV
by pda1122
06/23/18 06:14 PM
Managing Anger During Unexpected Tire Change
by TheLawnRanger
06/23/18 06:14 PM
2016 Honda Pilot appears to be consuming oil
by pilot1226
06/23/18 06:00 PM
New belt squeal cause damage to belt?
by pda1122
06/23/18 05:33 PM
Food Safety - If You Have Children
by Zee09
06/23/18 05:15 PM
Reduce TORQUE to COMPENSATE for lubed threads?
by SumpChump
06/23/18 05:02 PM
Chain cleaning and lube
by dadinfo
06/23/18 04:57 PM
Mobil Delvac 1 ESP 5w40 $23.65 at Walmart
by 71Chevyguy
06/23/18 04:36 PM
diesel oil in older engines- RE: cats etc
by 928
06/23/18 04:35 PM
2011 F-150 Ecoboost timing chain replacement
by 14Accent
06/23/18 04:31 PM
Newest Members
bwechols, bowupid, pod423, lemaitrix, azzid0906
65303 Registered Users
Who's Online
103 registered (bdcardinal, Balrog006, AITG, 2015_PSD, 11 invisible), 1441 Guests and 32 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
65303 Members
67 Forums
285882 Topics
4770895 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Page 1 of 2 1 2 >
Topic Options
#4500775 - 08/28/17 09:14 PM No dash level HVAC 1997 Buick LeSabre
csandste Offline


Registered: 05/31/02
Posts: 1186
Loc: St. Peters, Missouri
Son in law just bought a beater 1997 LeSabre-- 197,000 miles. Runs good-no dash level HVAC. Blender door actuator is easy to access behind glove box, but even when blender doors are moved manually nothing changes. There is air flow on floor and defrost.

So if it's putting out air, and the blender doors can be moved, why is there no air at dash level? Can't imagine that all duct work would be plugged.
_________________________
2017 Kia Soul Plus-- Valvoline MaxLife Blend 5-20

Top
#4500780 - 08/28/17 09:19 PM Re: No dash level HVAC 1997 Buick LeSabre [Re: csandste]
Rand Offline


Registered: 08/20/03
Posts: 12651
Loc: NE,Ohio
if there is loss of vacuum they default to that setting IIRC.

Its not like you move one blend door. its a complicated setup.
_________________________
2017 Jeep Cherokee Trailhawk V6

Top
#4500822 - 08/28/17 10:16 PM Re: No dash level HVAC 1997 Buick LeSabre [Re: csandste]
71Chevyguy Offline


Registered: 07/10/11
Posts: 416
Loc: Martinsburg West Virginia
I had that problem on a 98 lumina before, it ended up being a broken vacuum line by the vacuum ball. It would default to defrost without the vacuum but if you were heading down a hill decelerating, it would switch to whatever the dial was pointing to. I would go over all the vacuum lines you can see. Not sure where that is on the LeSabre. I have a 98 LeSabre , but I haven't had to fiddle with too much of that yet, so not sure where the vacuum ball is so you can trace lines from there.
_________________________
15 Chevy Sonic RS M1 Dexos1 / Delco filter
99 VW Beetle TDI M1TDT / Mann filter
98 Buick LeSabre PHM + G oil / Bosch filter
85 Skylark 2.5
71 Nova 250

Top
#4500832 - 08/28/17 10:24 PM Re: No dash level HVAC 1997 Buick LeSabre [Re: csandste]
gregk24 Online   content


Registered: 04/13/13
Posts: 5603
Loc: FL, USA
My brothers old 1991 Park Avenue with only 115K never blew at dash level either IIRC.
_________________________
2012 Honda Accord EX-L K24z3
53,xxx miles
PPPP 0w20 / Fram Ultra

2014 VW Jetta SE 1.8T ea888
37,xxx miles
Castrol Edge 0w40 / OEM filter

Top
#4500925 - 08/29/17 01:57 AM Re: No dash level HVAC 1997 Buick LeSabre [Re: csandste]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
The blend doors have to be moved in the correct sequence; you can't do that manually.

Verify power and ground to the actuators. The one that doesn't move, replace.

Top
#4500928 - 08/29/17 02:03 AM Re: No dash level HVAC 1997 Buick LeSabre [Re: Merkava_4]
csandste Offline


Registered: 05/31/02
Posts: 1186
Loc: St. Peters, Missouri
Originally Posted By: Merkava_4
The blend doors have to be moved in the correct sequence; you can't do that manually.

Verify power and ground to the actuators. The one that doesn't move, replace.


I thought there was only one actuator, behind the glove box. I suspect that ripping the dash out of this thing would cost almost as much as he paid for the car.
_________________________
2017 Kia Soul Plus-- Valvoline MaxLife Blend 5-20

Top
#4500951 - 08/29/17 04:43 AM Re: No dash level HVAC 1997 Buick LeSabre [Re: csandste]
BigD1 Offline


Registered: 08/12/15
Posts: 2575
Loc: NC
Bought a late 80's one owner Oldsmobile, and the owner said that the heat/AC never did blow right. Dug around in the dash, and somebody from the factory had used too long of a sheet metal screw during assembly, and it was catching the lip of the blend door, and was only letting the blend door open slightly.

Anyway, could be something simple like one of the main ducts disconnected causing it.
_________________________
1992 Toyota Pickup--Havoline HM 10W-30--Motorcraft FL-910S

Top
#4501016 - 08/29/17 07:21 AM Re: No dash level HVAC 1997 Buick LeSabre [Re: csandste]
Alex_V Offline


Registered: 04/10/16
Posts: 1155
Loc: Campbellsville, KY
I believe others are correct - when there's no vacuum the blend doors default to defrost/floor.

Pop the tabs in and drop the glove box down, and there's a vacuum manifold behind there - clear plastic in the shape of a revolver cylinder with vacuum lines running to it. The supply line from the engine comes over the HVAC box from the upper/outer side (right under edge of the windshield) - unplug that, start the car, and see if you have good vacuum at that line.

Does the vehicle in question have the lower-option manual climate control or the digital/auto option?
_________________________
I like Chevy and Valvoline.

'13 Cruze, 1.4T, 112K
'85 GMC C3500, 454, 130K
'82 Mercedes 300CD, OM617 turbo, 167K
'67 Suburban, 350, 331K

Top
#4501040 - 08/29/17 08:03 AM Re: No dash level HVAC 1997 Buick LeSabre [Re: csandste]
Chris142 Online   content


Registered: 06/05/03
Posts: 16835
Loc: Deplorable in apple valley, ca
Ya a vacuum leak. Open the hood and look and listen for it.
_________________________
02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40

Top
#4501067 - 08/29/17 08:39 AM Re: No dash level HVAC 1997 Buick LeSabre [Re: csandste]
WyrTwister Offline


Registered: 01/13/13
Posts: 1532
Loc: Texas
I worked on the HVAC on our 1991 Chevy Caprice . Do not know how much commonality there is with your 1997 Buick .

ended up having 2 problems .

A - No vacuum to the HVAC controls . Ended up being easier to run a new plastic vacuum line from the " ball reservoir " . Had to follow another path , than the original line .

B - the vacuum switching mechanism behind the HVAC controls was bad . Replaced that .

FWIIW , one of the blend doors was still controlled / moved bu the mechanical cable .
_________________________
Wyr
God bless

Top
#4501101 - 08/29/17 09:08 AM Re: No dash level HVAC 1997 Buick LeSabre [Re: csandste]
mk378 Offline


Registered: 09/27/15
Posts: 1421
Loc: USA
Check the vacuum source under the hood first before tearing into the dash. Very often this is as simple as the hose to the engine being broken or left unconnected.

Top
#4501182 - 08/29/17 10:31 AM Re: No dash level HVAC 1997 Buick LeSabre [Re: mk378]
csandste Offline


Registered: 05/31/02
Posts: 1186
Loc: St. Peters, Missouri
"Does the vehicle in question have the lower-option manual climate control or the digital/auto option?"

Only spent a short time looking at car but sure it's a manual, non zoned climate control, though with push buttons. Was struck by how technologically old the car was for late nineties. No gauges or tach, old-timey ribbon speedometer spread across dash, even had white wall tires. OTOH that 3.8 engine pulled well and I was reminded how good it really was.
_________________________
2017 Kia Soul Plus-- Valvoline MaxLife Blend 5-20

Top
#4501226 - 08/29/17 11:42 AM Re: No dash level HVAC 1997 Buick LeSabre [Re: csandste]
Alex_V Offline


Registered: 04/10/16
Posts: 1155
Loc: Campbellsville, KY
Are you sure it's a '97? That sounds way too archaic for anything of that body style. And the only climate control systems I've seen is the base equipment with a slider for fan speed and one for temp, and the automatic setup with a digital readout, up/down buttons for temp and fan, and push buttons for different modes (A/C, vent, etc.).
_________________________
I like Chevy and Valvoline.

'13 Cruze, 1.4T, 112K
'85 GMC C3500, 454, 130K
'82 Mercedes 300CD, OM617 turbo, 167K
'67 Suburban, 350, 331K

Top
#4501484 - 08/29/17 04:28 PM Re: No dash level HVAC 1997 Buick LeSabre [Re: Alex_V]
csandste Offline


Registered: 05/31/02
Posts: 1186
Loc: St. Peters, Missouri
https://www.google.com/search?q=97+leSabre+dash&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjQ-LzIsP3VAhUGYiYKHaSxAUQQ_AUICygC&biw=1366&bih=649#imgrc=q8ZlsW8JZG_EEM:

I'm sure there's better ways to link this page. Apparently there's two kinds of LeSabre dashes. Those for the old, and these which are for the truly ancient. This is really archaic even for 1997. The other one is much more modern looking. This is the tachless one on the right with the old-timey speedometer. This does have buttons but I don't think zones.


Edited by csandste (08/29/17 04:33 PM)
_________________________
2017 Kia Soul Plus-- Valvoline MaxLife Blend 5-20

Top
#4501490 - 08/29/17 04:36 PM Re: No dash level HVAC 1997 Buick LeSabre [Re: csandste]
mk378 Offline


Registered: 09/27/15
Posts: 1421
Loc: USA
You can be sure what model year you have by the VIN or the emissions sticker under the hood.

Top
Page 1 of 2 1 2 >