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low speed little cold a/c, high speed cold

phelpo on Wed September 19, 2012 4:44 PM User is offline

Year: 2007
Make: Saturn
Model: Vue
Engine Size: v-6
Country of Origin: United States

At low speed I get a little cold a/c, on the hwy 65 mph the a/c is fine.
What is wrong with the system? I had it charged last summer and
that helped some.

Phelpo

Cussboy on Thu September 20, 2012 9:24 AM User is offline

Quote
Originally posted by: phelpo
I had it charged last summer and

that helped some.

Was the leak fixed before that refrigeration was added? If not, then likely low again. These systems don't heal on their own.

I'd have the refrigerant professionally measured, and the leak fixed.

phelpo on Thu September 20, 2012 4:26 PM User is offline

no leak, he faced the fluid out and relaced it

mk378 on Thu September 20, 2012 5:42 PM User is offline

Make sure that the condenser fans all work. That is essential for the A/C to cool at low speeds or sitting still. If they do, see if you can get cool air by revving up the engine with the car sitting still. Success there might mean that your compressor is tired, though you would need to confirm a proper charge by weight and take pressure readings to confirm that diagnosis.

phelpo on Fri September 21, 2012 5:59 PM User is offline

MK, thanks for the advise, today I did just that, sat at a red light and reved to 1200 rpms, it produced more cooling that
before.

I'll check into the cost of a new or rebuilt one. Is one company better than another?

Phelpo

phelpo on Thu September 27, 2012 2:41 PM User is offline

any body else have an idea? how about the gm guy.

Phelpo

bohica2xo on Fri September 28, 2012 3:25 AM User is offline

Scroll compressor is dying / dead.

I just went through this with our 2007 Vue. The 3.5L V6 compressor is a real pain to swap too.

I saw the same crappy low speed cooling & checked the pressures. "Normal" cooling & pressures @ 3500 engine rpm. Almost nothing at idle. Recovered the charge, re-charged to factory spec - no change.

Stop running the A/C now. That compressor has not shed enough crap yet to kill the condensor, but it can very quickly. I got lucky and caught it quick. You are in the early stages of a cascade failure that just gets more expensive.

B.

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"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.

ezautoac on Thu October 04, 2012 10:58 PM User is offline

Why did he recover it and charge if he said there were no leaks? If that helped the situation there was likely little refrigerant in the system. Which means there was a leak. The fact that compressor is weak now is probably due to the fact that there was a leak and it was not getting the proper lubrication that it needs. Regardless, If you get it charged again and it works just fine...( and it sucks and blows fine ) I would get the leak fixed before as bohica said the compressor stops compressing.

classicair on Fri October 05, 2012 3:04 PM User is offline

Did someone change the thermostat setting, maybe during a cleaning? There's a knob in the refrigerator section somewhere; see if it's turned to "Off" or to a less-than-cold setting.

If you hear the motor running, but it doesn't get cold, it probably doesn't have any refrigerant to compress. That could be recharged, but modern refrigerators are pretty tight, so that would also indicate a leak. With a leak, it will need recharging again sometime later.

iceman2555 on Fri October 05, 2012 5:18 PM User is offlineView users profile

Excuse me...what knob?

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The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

ezautoac on Fri October 05, 2012 6:56 PM User is offline

I think classic air is talking about a refrigerator...

iceman2555 on Sat October 06, 2012 12:08 PM User is offlineView users profile

Ya really think so........boggles the mind.....spent four hours yesterday searching for that damn knob.

-------------------------
The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

bohica2xo on Sun October 07, 2012 4:03 PM User is offline

Gee Iceman, get with the program - we have an app for that now.

Soon techs with years of training will have to deal with Norbert Necktie & his silly white plastic me-phone telling them how to do the job.

Obviously the me-phone "app" works so well too. Completely misses the effect of the cascade failure where the compressor fails to build enough pressure at idle to turn the fans on - even when fully charged. I hope the "app" recommends sealer at every service, it will make diagnosis a snap - Me-phone in hand? TSR. Will actually make life simple.

B.
.

-------------------------
"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.

doltuku on Fri October 12, 2012 11:16 AM User is offline

thanks for all the information guys

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iceman2555 on Sat October 13, 2012 10:51 AM User is offlineView users profile

bohica2xo, I worked with a Gates rep recently and Gates has a app for determining belt wear. Down load the app...mark the belt with a 'special marker'...scan with the camera and viola....tells you if you need a new belt or not....or other wear indicators. Guess I should be working on a app....scan the compressor and the screen displays a warning........ "SIR, PUT DOWN THE WRENCH AND STEP AWAY FROM THE VEHICLE!!!"

I have been tempted to spend the cash for the app...just to see what it has it in....or it would be better if they would send a 'courtesy' download so the app could be previewed....at least then if the app 'the use of an instrument, typically the mouth, to produce a pleasing sensation' the review might not be quite so harsh.

-------------------------
The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

bohica2xo on Sun October 14, 2012 2:13 PM User is offline

That sounds like a "Belt Upgrade Limited Life Sales Hike Incentive Tool" aka BULLSHIT.

The "app" joke around the shop is the 2 lb lead hammer. Tight bushing? "I gotta app for dat"

We have other "apps" as well. Coyote problem? We have an app for that... LOL

B.

-------------------------
"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.

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