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Anthony
Anthony, ASE Certified Technician
Category: Saab
Satisfied Customers: 11750
Experience:  ASE Master Automobile Technician with over 20 years exp. in this field.
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Saab 9-3 Aero: The A/C compressor will not come on. Took it

Customer Question

The A/C compressor will not come on. Took it to local mechanic and he just evacuated, vacuum tested and recharged the system lol. Compressor will still not come on. I checked the fuse and it was ok. I purchased a new relay and am a bit confused as to the location, Where is he A/C compressor relay located ?, pulled the one the box in front of the battery (as per the owners manual) and it doesn't look anything like the one the auto parts store sold me?
Submitted: 1 year ago.
Category: Saab
Expert:  Anthony replied 1 year ago.
Hello!Its in the fuse panel next to the battery. Heres a picture of exactly where it goes and the pins it has:
Customer: replied 1 year ago.
Ok now i'm really confused lol. The owners manual shows that space empty, went out and poped the cover and low and behold no relay in that slot. I placed the relay in that space as per your diagram and Arrow. Still no A/C but it makes the engine run Rough???
Expert:  Anthony replied 1 year ago.
Did the AC ever work for you?
Customer: replied 1 year ago.
just tried this summer, thought it was blowing a little cool but not cold,just really got concerned about it as it is blowing hot now that it is in the 100's here, maybe it wasn't working at all?
Expert:  Anthony replied 1 year ago.
So the ac never worked for you?
Expert:  Anthony replied 1 year ago.
So the ac never worked for you?
Customer: replied 1 year ago.
Also were it shows a relay in the "Preheated oxygen sensors (lambda probe)" there isn't one
Customer: replied 1 year ago.
no not cold ever
Customer: replied 1 year ago.
Had A/C checked locally they just Evacuated, vacuum tested and recharged, even though it was not low or leaking, says 1.5 lbs is full, charged $150.00 and sent me on my way
Expert:  Anthony replied 1 year ago.
So the compressor never ran nor they did not check it to see if it ran?
Customer: replied 1 year ago.
no he did not check
Customer: replied 1 year ago.
told me to check the fuse and relay
Expert:  Anthony replied 1 year ago.
Ok, when you put the relay in does the engine slow down and do you hear any noises from the belt area?
Customer: replied 1 year ago.
when i called back after their service
Expert:  Anthony replied 1 year ago.
Right,when you put the relay in does the engine slow down and do you hear any noises from the belt area?
Customer: replied 1 year ago.
the only change after placing the relay where you told me to, is that i get a slight noise followed by intermittent rough idle, as for a noise in the belt area uncertain if no
Customer: replied 1 year ago.
slight noise maybe a light knock opposed to a click
Expert:  Anthony replied 1 year ago.
Can you see the AC Compressor pulley?
Customer: replied 1 year ago.
removed plastic cover from engine top, cannot even see serpentine belt? maybe not looking in the right spot which side Battery / Turbo side ?? or passenger ??
Customer: replied 1 year ago.
we are discussing 2007 9-3 Aero 6cyl Turbo ?
Expert:  Anthony replied 1 year ago.
It sounds like the compressor is jammed and someone removed the relay to stop it from engaging. It probably needs a new compressor.
Customer: replied 1 year ago.
is it like that that's why the other relay is missing as well?
Customer: replied 1 year ago.
there is a relay were the owners manual shows A/C compressor "in front of the battery" just wasn't one were they show a blank spot were you had me place one?
Expert:  Anthony replied 1 year ago.
Two manuals show that to be the compressor relay location one manual is from saab. The other relay position is vacant.
Customer: replied 1 year ago.
i see, my wise manual and owners manual show it to be vacant, but it does how ever produce some type of erratic engine performance as i placed one there, maybe indicating a locked up compressor??
Expert:  Anthony replied 1 year ago.
Yes, exactly a locked up or hard to turn compressor.
Customer: replied 1 year ago.
oic, i will go to the shop and physically check the compressor functionality ( eyes on ) to see if it is doing any thing at all, can i get back to you?
Expert:  Anthony replied 1 year ago.
Sure!
Customer: replied 1 year ago.
and would the missing ""Preheated oxygen sensors (lambda probe)" relay have anything to do with this situation?
Customer: replied 1 year ago.
Great! Thank You! I will check the compressor and get back to you.
Expert:  Anthony replied 1 year ago.
I wouldnt mess with the lamda probe unless you have a check engine light and a code for that part.
Customer: replied 1 year ago.
OK, noted, thanks again ill get back to you after i go check the compressor
Expert:  Anthony replied 1 year ago.
Sure!