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#1 2017-04-24 16:54:55

snipboy
Suga min banan!
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From: Sävar, Sverige
Registered: 2005-07-24
User Number: 590
Posts: 2099
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Is my AC Compressor dead?

I did a search and I am leaning towards the o-rings being bad.

Here are the symptoms...

-Suddenly stopped blowing cold air, after 12 years of trusty service
-Had it recharged blowed cold for an entire day
-Next day, blowing warm air, compressor will not turn on at all

My mechanic wants to replace the entire AC system for $1200, which I think is overkill. My research is indicating the compressor is dead, or a combination of o-rings and belts that need to be replaced are bad. I am thinking about picking up a used compressor and having him put that in.

Thoughts? My05 Aero now has 82K on it.


2005 saab 92x AP STG 2 Aero 4eAT - Midnight Mica Black - Premium

|  Eibach  |  Bell  |  Continental  |  Hella  |  Homelink  |  Inalfa  |  Injen  |  Jazzy Pro  |  Perrin  |  Prosport  |  STi  |  SubieGal |

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#2 2017-04-24 17:00:42

n_r_child
MFIC
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From: Denver. Past: Detroit & NM
Registered: 2005-06-14
User Number: 215
Posts: 4107

Re: Is my AC Compressor dead?

I'd guess it's an o-ring which allowed all of your refrigerant to leak. As I recall reading from trying to fix dead AC last summer, the compressor has a minimum refrigerant level / pressure in the system to kick on, and I'd guess that's so the compressor doesn't fry itself.


le sigh

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#3 2017-04-24 17:47:50

WDEagle
Unrepentantly Ideological
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From: Fernandina Beach, FL
Registered: 2005-05-11
User Number: 7
Posts: 1399

Re: Is my AC Compressor dead?

I have had to replace the oring at least twice on our  92x .  Cheap and easy fix.  I picked the o-rings up at Advanced auto parts.  One other time it was the AC Discharge hose that was bad.

O-ring Issue     http://saab92x.com/viewtopic.php?id=30782&p=1

Hose issue     http://saab92x.com/viewtopic.php?id=26517

Last edited by WDEagle (2017-04-24 17:51:41)


Hers --------> 2005 Midnight Black Flat Black Pearl White Saab 92x Aero w/sport 2016 Ultra White Lexus NX200t F Sport
Mine --------> 2004 Black Chevrolet Colorado ZQ8 2016 Lazer Blue Chevy Colorado Crew Cab
Ours --------> 2004 Millennium Yellow Chevrolet Corvette Coupe
Ours 2 --------> 1966 Arcadian Blue Ford Mustang Coupe

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#4 2017-04-24 18:19:03

snowphun
Member
From: Central CT
Registered: 2005-11-09
User Number: 890
Posts: 250

Re: Is my AC Compressor dead?

Yep, o rings are relatively easy to swap out. I would put in some UV dye and pin point the leak, you can buy R134a with dye it in, put it in and find the leak.

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#5 2017-04-24 18:30:18

krazykarguy
Worst ninja editor, ever.
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From: South Carolina
Registered: 2007-04-06
User Number: 1944
Posts: 8171

Re: Is my AC Compressor dead?

Refill with R134 with tracer dye. It will work again, temporarily.

Search all components for leaks with a a black light. Replace only what is leaking.


2005 Aero 5MT
2014 Ford Mustang GT Premium 6MT - Sterling Gray Metallic

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#6 2017-04-24 20:28:55

dotmaster206
Member
From: Denver, CO
Registered: 2012-03-10
User Number: 7123
Posts: 1968

Re: Is my AC Compressor dead?

Yeah definitely do not go back to that mechanic. He's out of his dang mind. Sounds like his troubleshooting process is to just immediately assume everything possibly related is broken and irreparable and so replace it all at maximum cost.

Your compressor is almost certainly fine, since refilling it made it kick on and work until the system leaked out again. As n_r_child and krazy mentioned, there is a pressure sensor that will keep the compressor from engaging if the refrigerant pressure is to low. That's a protection mechanism. You just need to find the leak. If you're not up for doing this stuff yourself, find a different mechanic for this and all future jobs.

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#7 2017-04-27 18:35:46

snipboy
Suga min banan!
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From: Sävar, Sverige
Registered: 2005-07-24
User Number: 590
Posts: 2099
Website

Re: Is my AC Compressor dead?

Thanks guys. Followed most of the advice here and did the work myself. Spent nearly 3 hours driving with very cold air today. Didn't quite fill up my system entirely, ran out of refrigerant. Will see in the morning if there is more leakage and more in then. Kind of cool how the compressor just kicks right on as it detects the refrigerant. Overall, simple process!


2005 saab 92x AP STG 2 Aero 4eAT - Midnight Mica Black - Premium

|  Eibach  |  Bell  |  Continental  |  Hella  |  Homelink  |  Inalfa  |  Injen  |  Jazzy Pro  |  Perrin  |  Prosport  |  STi  |  SubieGal |

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#8 2017-04-27 19:43:19

krazykarguy
Worst ninja editor, ever.
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From: South Carolina
Registered: 2007-04-06
User Number: 1944
Posts: 8171

Re: Is my AC Compressor dead?

Where was the leak?


2005 Aero 5MT
2014 Ford Mustang GT Premium 6MT - Sterling Gray Metallic

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#9 2017-04-27 20:25:40

snipboy
Suga min banan!
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From: Sävar, Sverige
Registered: 2005-07-24
User Number: 590
Posts: 2099
Website

Re: Is my AC Compressor dead?

O-RING at the top side of the compressor had a crack in it. I replaced both of them at the compressor to be safe. It's possible I have leaks elsewhere. Should have a good sense tomorrow.


2005 saab 92x AP STG 2 Aero 4eAT - Midnight Mica Black - Premium

|  Eibach  |  Bell  |  Continental  |  Hella  |  Homelink  |  Inalfa  |  Injen  |  Jazzy Pro  |  Perrin  |  Prosport  |  STi  |  SubieGal |

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