mike napoli Posted April 29, 2006 Share Posted April 29, 2006 I think I have a clog in a/c .I have no presure on low side ,And there is about 160 Lbs on hi side with 3 , 13oz cans of refrig in system,I changed the reciever dryer,,,No help???? Quote Link to comment Share on other sites More sharing options...
CUMan Posted April 30, 2006 Share Posted April 30, 2006 The mid-90's ES models are notorious for expansion valve problems in their A/C systems. I don't know if a sticking expansion valve would cause your particular pressure differentials; however, it is the first thing I would check. This has been discussed numerous times on this forum. Do a search. Quote Link to comment Share on other sites More sharing options...
mike napoli Posted May 1, 2006 Author Share Posted May 1, 2006 The mid-90's ES models are notorious for expansion valve problems in their A/C systems. I don't know if a sticking expansion valve would cause your particular pressure differentials; however, it is the first thing I would check. This has been discussed numerous times on this forum. Do a search. Is it attached to the evaporator and is it hard to get out. Quote Link to comment Share on other sites More sharing options...
CUMan Posted May 1, 2006 Share Posted May 1, 2006 Yes, it is located on the back side of the evaporator (between the firewall and the evaporator). It is very difficult to access. I had this valve replaced on our 94 ES in 2004. It cost about $450.00 at an independent auto air repair place. The Lexus dealer wanted around $700. The system has worked great since that time. Quote Link to comment Share on other sites More sharing options...
mike napoli Posted May 1, 2006 Author Share Posted May 1, 2006 Yes, it is located on the back side of the evaporator (between the firewall and the evaporator). It is very difficult to access. I had this valve replaced on our 94 ES in 2004. It cost about $450.00 at an independent auto air repair place. The Lexus dealer wanted around $700. The system has worked great since that time. Thanks ,I am going to attempt it ,The air is working now,but it will fail sooner or later,Thank's Quote Link to comment Share on other sites More sharing options...
bif Posted April 20, 2008 Share Posted April 20, 2008 I also had this problem last year. The symptom was that the A/C would sometimes blow warm air. I went to a gritty mechanic who connected his gauges to find that the expansion valve was stuck closed. Ultimately, I had it fixed at a Lexus dealer for $800. Now, one year later, I have a similar problem. That is, the air is relatively warm. It does get somewhat cool, but not by much. Another odd thing is that the air blower immediately starts blowing air when I start the car. It used to be that the blower would have to wait a few minutes before starting up. Anybody know what this new problem might be. Quote Link to comment Share on other sites More sharing options...
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