Bowie5

My A/C blows cold When it feels Like it, The Clutch turns even when its not Blowing cold, But the gauges read 75 lbs on low side and 100 on high side, which makes me think the compressor is not Compressing , then the next time you get in it, It will freeze you out for a while the it stops working again, Once I got mad Took off real fast and it started working again,, Any Ideas Before I buy a new Compressor, ????

honeygee2

Check high pressure switch on the front of the radiator

Bowie5

I unplugged it and the compressor clutch stopped, plugged it back in and the clutch came back on.

ancdmd

usually this is a result of the compressor failing, happened to me

Riick

B4 you get a new compressor, and a new receiver/dryer, and a few pounds of R134a, and borrow a vacuum pump, use your set of gauges to diagnose problem.

here's a start: http://www.examiner.com/article/air-...ge-diagnostics

BMW7_LS430

What is the normal pressure for LS430?

Bowie5

Yes as stated in my original post, the low side pressure is High, and the High side pressure is Low, which means the Compressor is not Compressing. However Lexus (LS 430) Compressors have Electronics made on to the top of there Compressors. which receive signals from the thermostatic controls, and open and close the valves in the compressor to keep the set temperature, in the car constant, I need to know how to test the Electronics, from the thermostat in the dash to the electronics on top of the compressor, The compressor is sold for 275.00 W/O the electronics, and 535;00 W/ electronics, or it could be the A/C controls in the dash not sending a correct signal, This is my delima,

Bowie5

It should be (Approx) 45 lbs on the Low Side and (Approx) 220 lbs on the High side,