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Discussion Starter · #1 ·
Hi all I am from Hong Kong. I have some questions about the air con of my 9-5. The weather in Hong Kong is around 30 deg C now in the noon time and very humid. I found that when my car was soaked under the sun for few hours and tried to start at the noon time, the cabin just can marginally cooled down with 'LO' settings after the whole driving trip. I don't know whether it is the norm since it is my first Saab. Could anyone share some of their experience with me?

Actually i had done the followings but the situation seems the same:
1. Replaced cabin air filter
2. Reset ACC unit (Auto + off), originally had 8 & 11 code. I have replaced the two lever, which were damaged. After replacement, no codes now
3. Checked the feron low pressure peaked at 35psi with LO setting at noon time
4. Cleaned the condenser coil at the front of the car.
5. Cleaned both can air temp sensor, mix air temp sensors with alcohol.

Thanks for any help in advice. Cheers!:D
 

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Its possible that the freon is low. If this is the case, I would take it in and have it topped up, but more importantly is where did it leak from. Its also possible that there is a clog in the system where the freon isnt flowing like it should. Have you heard any loud noises from behind the dash recently?
 

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Discussion Starter · #3 ·
Thanks mt.aero. No I didn't found any abnormal noise when the air con is running. Also I cannot found the sight glass which it should present on other cars. Where is the sight glass in 9-5? Lastly what is the correct peak values of feron low pressure when the AC is running at LO settings? Thanks very much for the help anyway!!
 

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I had this same complaint last year and after some time passed mine failed completely. Took it into the shop and they said the receiver and a pipe needed to be replaced. Can't remember exactly what the cost was, but I think it was $400-600.

Not saying that's your issue, but I might start putting some money away just in case.
 

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Discussion Starter · #5 ·
I had this same complaint last year and after some time passed mine failed completely. Took it into the shop and they said the receiver and a pipe needed to be replaced. Can't remember exactly what the cost was, but I think it was $400-600.

Not saying that's your issue, but I might start putting some money away just in case.
So does it means your receiver/ pipe leaks feron or air coming into the system and caused the failure?
 

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So does it means your receiver/ pipe leaks feron or air coming into the system and caused the failure?
Apparently it was leaking "freon" (or whatever it's called now) slowly at first but then finally the system couldn't hold pressure at all.
 

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Discussion Starter · #10 ·
I have finally checked low pressure & high pressure tonight. Today is about 24 deg C. The air con was set to 'Lo' setting. When engine at idle speed, low pressure side is about 36psi, high pressure side peaked at around 220psi. When engine speed increased to 1500rpm, low pressure side still 36 psi, but high pressure side peaked at 250psi then suddenly dropped to below 200 psi.

Seems that there is a cut-out of the feron pressure due to over pressure protection...

What is your view? In my opinion the low pressure side seems ok but near the high side, but the increase of high pressure side then sudden drop seems abnormal...
 

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Honestly, I am completely uninformed when it comes to how A/C systems should operate when working correctly. It's never been an area of my vehicles I have done myself (This car is the first one I've owned where the A/C failed!).

I know there are several others on the board with experience with these systems, if one of them doesn't stop by this thread, you could try browsing one of the existing threads about A/C and see who replies and then throw them a Private Message.

Sorry I can't be more help! ;oops:
 

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I would take the car to an aircon specialist who will have the correct info & machinery to put the exact weight of refridgerant/compressor oil into the system. Too much will result in the cut out and too little will mean warm interior. They will also be able to test the system for you under UV lamps for leaks and also comment on the receiver/dryer effectiveness.
 
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