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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 06-12-2013, 03:46 PM   #1
4thearth
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Join Date: Feb 2013
Location: Greenville, SC
Posts: 4
My Ride: 2000 323Ci
DIY: AC problem diagnosis

I bought a 2000 323CI in November and I'm having trouble with the AC. Since I bought the car in November it was nice and cool so I don't think I checked the AC, but then again maybe it did work but the point is it doesn't work now and it's hot as hell.

Couple days ago I went out and bought some refrigerant with a pressure checker. Well when I check the pressure with the "AC" blasting it was reading I was at 100 PSI . So now I'm stumped.

I checked the compressor and it seems to be spinning, but I also read that when you turn the AC unit off your compressor is suppose to stop spinning and mine never stops, so either thats a problem or I'm not looking at the right thing (just checked and I'm 95% sure I'm looking at the right thing).

Also, yesterday I let out the pressure in the car until it was around 45 PSI but nothing changed except for the fact that the "AC" whines through the vents when I get up past 2500 RPMs now. Should I be scared? Or does anyone know how to diagnose something like this.

EDIT: I just checked the car again and it's back to 100 PSI on the low pressure valve . It was about two days ago that I had lowered it to 45 PSI, so I don't know if that helps anyone but I am beyond stumped.
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Last edited by 4thearth; 06-12-2013 at 04:06 PM. Reason: Updated info
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Old 06-12-2013, 06:14 PM   #2
4thearth
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Join Date: Feb 2013
Location: Greenville, SC
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My Ride: 2000 323Ci
Just lowered the freon pressure AGAIN but it's already starting to climb again, it's almost like I don't have a leak, but a... suck? vacuum?

I think there might be a clog in the system is pretty much what I'm getting out of this and it might be stemming from the fact that the compressor NEVER turns off.
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Old 06-12-2013, 06:15 PM   #3
//Maxwelljuppercut
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Join Date: Aug 2012
Location: il
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My Ride: e46
clogged orifice?
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Old 06-13-2013, 11:29 PM   #4
2002330i
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Join Date: Dec 1969
Location: NY, Queens
Posts: 257
My Ride: 2002 330i
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DIY: AC problem diagnosis

Had the same issue. When cars was cold it would blast out cold air as it warmed up up so did the air. Ended up being a clogged orifice.


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