cuda6pak Posted June 2, 2010 Share Posted June 2, 2010 When I bought my LS400 about 2 months ago, the car had already been converted to R134a. The compressor was making a very slight grinding noise like the bearing was starting to wear out. The A/C always worked great on the highway at 45+mph, but around town it was just somewhat cool. I figured it was just low on refrigerant. Fast forward to this weekend and I make a trip down to Florida. The A/C worked the entire way down, nice and cold. I even noticed in Florida traffic when I finally got there that the a/c was staying very cold and working really good. Well I park it over the weekend, then pick it up at the valet 2 days later to head home. I drive off for a few minutes and then put the A/C since I was on the highway and it would be nice and cool. No A/C! The compressor wasn't even turning on. Got home last night and ran the A/C diagnostic codes as per lexls.com. Nothing shows up, just a 00 (indicating system should be fine?). The A/C button stays lit up after I press it and does not blink. After reading a few threads on here I decide to test if the compressor will even turn on. I got underneath the fuse box and pulled the MG Clutch relay and bridged the two copper terminals with a wire. The compressor immediately turns on, so it should just be low on refrigerant right? I put a gauge up to the low side of the A/C system and the pressure is at about 15psi. Great, hooked a can of R134a up to it and got the pressure up to a nice 35psi. Checked the A/C......its still blowing warm! I can hear the compressor turn on everytime I turn on the A/C, but no cold air whatsoever, even at highway speeds. Does anyone have any ideas what could be wrong? 95 degrees and no A/C sucks! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.