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Old 07-05-2018, 12:59 PM   #1
havok
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Default 2007 Saturn Vue Greenline AC

This questions pertains to my 2007 Vue Greenline with 170,000 miles.

So, living in Vermont, I very rarely use my AC ... turn it on once in a while to keep it lubricated, etc.

With the weather in Vermont the last week or so, (100 and humid) I've been running the AC a fair amount ... sometimes with the recirc on, sometimes fresh air. All has been working fine and the AC has been appropriately cold (keeping in mind that the Vue turns off the compressor when at a stop light if the AC is on "green" and not "orange").

So, today, temp is about 86-89 with humidity of about 65% and I was running the AC on a 30 mile drive, up into the mountains and back down. About halfway back to my office, the AC stops blowing cold air. I turned the AC selector off, turned the recirc off and turned the blower off.

I then turned the blower back on, turned the AC selector back on (snowflake) and I hear what sounds like something hitting the ground under the Vue (I did not see anything in the rearview or sideview mirrors and could not stop). No matter what setting I used, I could not get cold air to blow again.

Any ideas? Could I have iced something up, which that ice then fell off and was the source of that noise? If that is the case, will leaving the car sitting for a few hours allow the temp sensor to reset? I'm going to take the Vue to my favorite independent service center on Monday but am curious as to what could possibly have happened ... especially with that noise of something falling off and underneath the Vue.

Thanks to anyone for any ideas!!

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Old 07-06-2018, 07:48 AM   #2
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Default Re: 2007 Saturn Vue Greenline AC

If you can, look under the hood for anything unusual then crawl under and look again. If you can't do this and the Vue is drivable, it may be wiser to visit a repair shop sooner rather than wait.

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Old 07-06-2018, 10:08 AM   #3
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Default Re: 2007 Saturn Vue Greenline AC

Thanks for the very sage advice ... the Vue was drivable ... made it the last 20 or so miles back to my office and then the 25 miles back to my house with no issues whatsoever ... except for the lack of AC.

I did stop at my usual place for service and they will look at the vehicle on Monday. I had a OBDII device that I plugged in to see if there were any codes set (the cat is barely below efficiency so I often have the CEL illuminated). There were no codes ...

It was all very odd ... my only thought is that the drive belt has been chirping occasionally (had it checked and no glazing or cracks) so I'm presuming that I blew out the compressor clutch ... which makes sense given the age. I'm just not sure about the odd noise when I turned the AC back on to test ...

Regardless ... thanks again.

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Old 07-08-2018, 01:49 PM   #4
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Default Re: 2007 Saturn Vue Greenline AC

I have seen several compressor clutch outer plate be come loose and fall off. (green line only)
The clutch plate is splined to the compressor shaft and held in place with a small bolt. Because the compressor shaft is also damaged you'll need to replace the compressor

also check for the AC condenser leaking (oil stain) from low corners

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Old 07-08-2018, 07:20 PM   #5
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Default Re: 2007 Saturn Vue Greenline AC

Thanks for that ... that is very interesting and sounds plausible.

I did as fdryer suggested and took a quick look around with the engine running and not and saw nothing amiss. The vehicle runs exactly the same ... albeit with no cold air with the AC turned on.

I will make sure that the garage checks the condenser for leaking oil.

I greatly appreciate your experiential-based advice!

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Old 07-09-2018, 12:59 PM   #6
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Default Re: 2007 Saturn Vue Greenline AC

Quote:
Originally Posted by bern View Post
I have seen several compressor clutch outer plate be come loose and fall off. (green line only)
The clutch plate is splined to the compressor shaft and held in place with a small bolt. Because the compressor shaft is also damaged you'll need to replace the compressor

also check for the AC condenser leaking (oil stain) from low corners
so ... great deductive work!

i relayed your suggestion about the clutch outer plate / cover possibly being what i heard falling off and, sure enough, that's exactly what it was!

a little bit of dye on the low pressure side by the switch ... they think it's just the seal where the line connects to the switch.

so, the big question is ... and i welcome all opinions ... do i replace the compressor? it's just over $200 from rockauto.com plus about 2.5 hours of labor (around $200). we don't use it much at all but i wasn't sure if the defrost required the use of the compressor. the Vue has almost 180,000 miles on her! what a great vehicle!

thanks for everyone's opinions and suggestions!

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Old 07-09-2018, 03:20 PM   #7
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Default Re: 2007 Saturn Vue Greenline AC

This can be an inexpensive fix with a junk yard clutch plate, bolt and washer shims to the expensive repair of replacing compressor and drier first. If a leak occurs afterwards, more repairs follows. Defrost uses ac to help dehumidify air when temps are above 40F. Below 40F ac is automatically disabled.

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