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Buick LaCrosse Heating / Cooling Problems

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#2 of 15 Air Recircualtion button has odd behavior... by frankk Jul 10, 2006 (9:39 am)
I have a new CX. This is equipped with the basic A/C system (not the fancy thermostat, dual zone job). I have observed a few behaviors with the recirculate button (these only pertain when A/C is engaged):   1) When I start the car recirculate is always on. 2) Under hard acceleration recirculate turns off and turns back on upon ending accelaration. 3) If recirc is off it turns on after hard accelaration has ended.   Has anyone else seen this behavior? The owners manual says nothing about this. Replies to this message: imidazol97 (Jul 10, 2006 11:49 am) frankk (Jul 12, 2006 9:24 am) imidazol97 (Jul 12, 2006 10:13 am) evandro (Jul 12, 2006 1:12 pm) and 2 more...
#3 of 15 Re: Air Recircualtion button has odd behavior... [frankk] by imidazol97 Jul 10, 2006 (11:49 am)
Replying to: frankk (Jul 10, 2006 9:39 am) I don't have a service manual for the newer car but I would assume it's like the 200X leSabre/ParkAves. I have the auto air but manual should be same. When recir is selected manually, it turns off when car is off and restarted. I have never seen recir turn off when compressor clutch disengages during hard acceleration (to provide more power to wheels). I believe that probably is problem. Same for turning on after hard acceleration when compressor clutch is disengaged.   I think you need to document this with a work order under warranty with your dealer. I would suspect a bad control head or switch unit or even a flaw in the main computer that turns off the cluthc for the compressor. Replies to this message: frankk (Jul 12, 2006 9:24 am) imidazol97 (Jul 12, 2006 10:13 am) evandro (Jul 12, 2006 1:12 pm) frankk (Jul 17, 2006 10:54 am) and 1 more...
#4 of 15 Re: Air Recircualtion button has odd behavior... [imidazol97] by frankk Jul 12, 2006 (9:24 am)
Replying to: imidazol97 (Jul 10, 2006 11:49 am) Thanks for your reply. I took the Lacrosse in this morning and they just called me. The official word is that those behaviors are intended. Anyway, the tech has offered to show me the documentation (manuals, etc.) to back this up.   I don't mind the recirc always being on when you start the car when the A/C is on, since this is what one might do anyway to cool the cabin quickly.   But I do not like the idea of recirc turning on by itself after heavy acceleration. I'll see what the tech's official explanation is for this one. Replies to this message: imidazol97 (Jul 12, 2006 10:13 am) evandro (Jul 12, 2006 1:12 pm) frankk (Jul 17, 2006 10:54 am) 62vetteefp (Jul 17, 2006 11:19 am)
#5 of 15 Re: Air Recircualtion button has odd behavior... [frankk] by imidazol97 Jul 12, 2006 (10:13 am)
Replying to: frankk (Jul 12, 2006 9:24 am) When the car is hot relative to the outside temp I've noticed that recirculate comes on for a few minutes automatically on both cars BUT it does not turn the light on in the button to indicate that it's on. It's equivalent to the old MAX settings on earlier cars for cooling down immediately after starting then you used the typical air conditioning positions on the slide switches the rest of the time.   You indicated the light turns on. That's different than the Buicks I'm used to.
#6 of 15 Re: Air Recircualtion button has odd behavior... [frankk] by evandro Jul 12, 2006 (1:12 pm)
Replying to: frankk (Jul 12, 2006 9:24 am) But I do not like the idea of recirc turning on by itself after heavy acceleration. I'll see what the tech's official explanation is for this one.   I think that someone has already said that it's probably because the AC compressor is shut down under hard acceleration. Then, on hot and humid days, if recirculation is not activated, you'd feel a blow of hot, humid air after a couple of seconds accelerating hard (as on a merge ramp).   As long as recirculation is deactivated when the foot lightens up, I actually think that it's a pretty cool feature. Replies to this message: frankk (Jul 17, 2006 10:54 am) 62vetteefp (Jul 17, 2006 11:19 am)
#7 of 15 Re: Air Recircualtion button has odd behavior... [evandro] by frankk Jul 17, 2006 (10:54 am)
Replying to: evandro (Jul 12, 2006 1:12 pm) Here is the official word from the tech: It has to do with the position of the temperature control. When set to the coldest position, I get the "behavior". However, all it takes is to set it to one click above coldest and everything works as normal. The tech said that this is by design. Replies to this message: 62vetteefp (Jul 17, 2006 11:19 am)
#8 of 15 Re: Air Recircualtion button has odd behavior... [frankk] by 62vetteefp Jul 17, 2006 (11:19 am)
Replying to: frankk (Jul 17, 2006 10:54 am) I think the logic here is that since you have it on the coldest setting you want the coldest possible air which is recirc.
#9 of 15 AC 2005 Allure by kairns Sep 21, 2006 (10:49 am)
My 2005 Allure has 37000 kms on the odometer. I purchased it used about two weeks ago. I've noticed my AC takes a while to cool the car down. It seems like instant cold air isn't available. It can take up to 10 - 15 minutes to feel the full effect of the AC. However, once the AC comes up to speed it has no problems keeping the interior cool. I've tried all the settings including re-circulate at max fan speed.   I also tried all the old proven methods such as opening all the windows for a few minutes to expel the hot air etc.... This doesn't make any difference.   Is this normal for this car? My last vehicle was a 1999 Oldmobile Silhouette and I always had ample AC on demand. Replies to this message: sscott3 (Sep 26, 2006 5:01 pm)
#10 of 15 Re: AC 2005 Allure [kairns] by sscott3 Sep 26, 2006 (5:01 pm)
Replying to: kairns (Sep 21, 2006 10:49 am) It sounds like you have lost some refrigerant. Do you have the auto system or manual controls? The auto system does not come on with high fan speed normally and it may seem like it takes awhile to work. Don't let this go over the winter before getting it fixed as the refrigerant will continue to leak out. It contains a lubricant for the compressor. The system will run on defrost in the winter to clear the windshield on the inside. If the refrigerant gets too low you could damage the compressor. Your GM dealer should be able to find the leak and refill the system.

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