96 PA climate control issue


journeymanmach
12-07-2008, 04:28 PM
Have already searched thru previous posts to solve problem with no luck resolving the issue. Am looking for specific help.
I have a 96 Buick Park Ave. with a 3800 engine, and automatic climate control. During some recent work that was done on the car the battery was disconnected without shutting off the ACC. now one side blows out hot the other cold. Seems to work correctly for a very brief period, then temp starts to blink then blend doors position themselves to blow out hot on drivers side and cold on passengers's side, the back vents blow hot and defrost cold. Have tried a couple different procedures with no effect, not sure we are tring the right thing.


Thanks, Mrs. Journeyman

HotZ28
12-07-2008, 09:40 PM
When the battery is disconnected with the climate control on, your control system will search for the correct position when you start the car. It may take some time, but if you are patient and no faults are found, the system should reset and start working correctly after about 50 ignition cycles.

journeymanmach
12-10-2008, 02:53 PM
Thanks for the info. I've already had more than 50 ignition starts. But when I thought about it each time I started the car the ACC was off. Am now making sure that when I start the car it's on.
Mrs. Journeyman

99parkave
12-11-2008, 08:19 AM
I am having the same problem on my 99 PA only drivers side is cold,just got the car so im not sure if the battery was disconnected or not before I got it,anyway its a pain to keep the windshield clear,would love any help I can get,cause I know nothing about it.

99parkave
12-11-2008, 01:38 PM
I just took mine to the shop,they said it is a flaper actuator under the dash and its a very commom problem 170$ total

HotZ28
12-11-2008, 06:16 PM
I just took mine to the shop,they said it is a flaper actuator under the dash and its a very commom problem 170$ total
The actuator may be a "common problem", but did the dealer remove the glove box to verify that the actuator is not moving the blend door, or did they just tell you that this is a common problem. Did the dealer replace your actuator and if so, is it working correctly? BTW, this system has quite a few "common problems" so be careful what you agree to let a shop/dealer do.:grinyes:

chevygirl_2004
12-12-2008, 01:54 AM
My 95 PA has the same issue except backwards. The warm air comes out of the drivers side and cold out of the passenger side. On mine there are stoppers that hold the glove box in the open position. I have to release those and reach back in the dash and move an arm that is back there to close the doors. I am going to replace the motor for that soon and see if that help. Our generally only does it if the temp control goes to auto. for some reason that door opens back up and I have to shut it again. I think this is a rather common problem on these cars from what i have read. At least it is for the ones that have the dual climate control. out temp light also flashes and then quits after a few minutes.

99parkave
12-12-2008, 07:42 AM
Yes its working now,heat on both sides,more important defrost on both sides.

HotZ28
12-13-2008, 11:25 AM
The typical actuator failure is shown below:

http://img81.imageshack.us/img81/1084/actuator1hx8.jpg

99parkave
12-13-2008, 04:09 PM
Could anyone tell me exactly where the actuator is located,and what all needs to be removed to get to it thanks

bigsky
12-14-2008, 04:42 AM
Could anyone tell me exactly where the actuator is located,and what all needs to be removed to get to it thanks

There are 4 actuators on the 99: Air Inlet, Mode, Driver Air Mix (temp), and Passenger Air Mix (temp).

The Air Inlet Actuator looks to be the hardest to replace.

Recently replaced the passenger actuator on a 99; had the famous "clicking" noise because the actuator motor would keep oscillating after it reached its position (does not hurt anything, just keeps making noise).

Remove right sound insulator/kickplate, glovebox, and Body Control Module (BCM). Can then get at the 2 screws for the actuator. Manual also recommends removing the fuse for the airbags (in underhood fuse center) and disconnecting the yellow jacket wire in the sound insulator (I did not do this or the fuse however).

Driver and Mode are very close to one another. Remove left insulator, aspirator muffler, driver actuator, then mode actuator.

The air inlet actuator is way behind the glove box. According to the manual (yes they sometimes have errors), have to get the fuse/relay center out of the way to access, along with the BCM and AC/Heater Programmer.

The00Dustin
12-14-2008, 12:33 PM
Recently replaced the passenger actuator on a 99; had the famous "clicking" noise because the actuator motor would keep oscillating after it reached its position (does not hurt anything, just keeps making noise).Is this "famous clicking noise" followed by a hiss? Can it continue even when the climate control system is turned off? Does it start out sounding like a loose speedometer cable (yes, I know these cars don't have a cable for that)?

bigsky
12-14-2008, 06:44 PM
Is this "famous clicking noise" followed by a hiss? Can it continue even when the climate control system is turned off? Does it start out sounding like a loose speedometer cable (yes, I know these cars don't have a cable for that)?

Yes...sounds like the same problem. GM issued a service bulletin and they described it as a "tick-tock" sound. Mine continued even when the system was off.

The motor moves the blend door, but then keeps oscillating (slightly moving back and forth) after it reaches its desired position.

This is a different problem from the broken gear inside the actuator. With this problem, the actuator works to adjust the blend door correctly, but then keeps making noise.

The passenger new GM part #89018365, replaces #16163982 (driver side is different). Check e-bay...GM retail $200+ but can save or even get the Dorman version for less. (NOTE: in the GM bulletin their fix was to purchase a $3 spring to install in the cover of the actuator...however, I just purchased the new updated actuator.)

For the passenger actuator, one can drop the glove box (without removing, with the two rubber tabs on the back of the glove box), and observe the actuator to see what it is doing. If the gear is moving, but the temp. is not adjusting, would then probably be the broken gear problem.

journeymanmach
12-20-2008, 03:20 PM
Hey, HOTZ28,
You seem to know alot about this problem with the park avenues. I believe I have had over 50 Ignition starts with the ACC on, still having the same problem. Actuator is working the blend doors just not correctly. After I start the car and run it for awhile I can shut it off then restart it and have heat out both sides for about 15 seconds before the system decides to re-adjust itself. Then temp light starts blinking and cold starts to blow out passenger side. I've read that the newer PA's have 4 actuators, I only know of the one behind my glove box. Had the glove box out, and watched the actuator work the blend doors, doesn't seem like anything is broken. Any other words of wisdom you can give me. I really hate to go to the stealer oops I'm mean dealer. Never sure what they might do.

Thanks!

HotZ28
12-21-2008, 02:31 PM
(http://www.automotiveforums.com/vbulletin/showpost.php?p=4995496&postcount=2)In lieu of a dealer Tech II scanner reset, Click Here (http://www.automotiveforums.com/vbulletin/showpost.php?p=4995496&postcount=2) for some DIY advice on how to disconnect the blend door actuator rod and reset the actuator position.

Smitty's Buick
10-12-2009, 05:58 PM
Hey guys! Newbie here, but a long time "lurker". I've received some great advice and tips from this site. This thread has helped me troubleshoot the same problems mentioned above, but I would like to know how to proceed beyond the test that HotZ28 posted at the end. My system did just as expected, but when I shut off the car and restarted it, the system went back to its evil ways. What is the problem? Do I need to try some more things to get the system working properly? Thanks for all your guys help!

ZiggyPA
10-13-2009, 02:52 AM
Have you already tried resetting the system?

Smitty's Buick
10-13-2009, 04:54 PM
Hey ZiggyPA! If you mean disconnecting the battery - yes. I don't know much more about how this system works other than what I have found here. If the actuator is bad, will the door still open and close like I witnessed?

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