Youtube Has Videos Worth Watching on Saab AC Repair - Saab 9-5 Bulletin Board - Saabnet.com
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Search YouTube for videos on others replacing their compressor (and look it up on WIS). They are very helpful. This job should be researched first before wrenching - you might also have it assessed by a shop before doing anything. You'll need to have the refrigerant reclaimed from the system first anyway; it is illegal to release it into the air. Maybe it's only your relay or a fuse (assume you checked the fuse) or just a low charge due to a leak.
Technically, there could be small pieces of metal in the lines (from compressor damage) and I've seen recommendations to flush the lines or the warranty for the compressor may not be honored if it also subsequently dies; there are also videos on flushing lines. Bernie is correct about compressor oil, but new compressors often come filled with the right amount. A vacuum pump is also needed to evacuate the system before refilling and many folks get one at Harbor Freight. The exact amount of refrigerant is needed per the sticker on the fender label. Overfilling will adversely affect AC performance just like insufficient refrigerant. Once the system is open to the atmosphere, the receiver drier is usually replaced. Wrangling the compressor out of the tight space is reported by those who've done the work.
I have to replace mine as well, but discovered a more immediate issue with an oil cooler line that is corroded that should be addressed first in my 2000 9-5 SE.
The more details you learn about your Saab, the more interesting it becomes.
2000 9-5 SE 3.0L V6
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