rudeboy Posted August 28, 2003 Share Posted August 28, 2003 New member. You guys have some great tips. I have a 1990 LS 400 with 190K, the car still drives great. However, there are a few known problems with it. The AC is not working and the climate control LCD is black. Please,I need some help with this. The heat is on all the time, the off button does not turn it off. The heat is on low but with no AC in the summer you can imagine how hot the car is. How do you turn the heat off? Thanks. Quote Link to comment Share on other sites More sharing options...
spiller91ls Posted August 28, 2003 Share Posted August 28, 2003 try pressing the auto button on, then press the down button to a lower temp, till it stops beeping when you press the button. Quote Link to comment Share on other sites More sharing options...
SKperformance Posted August 29, 2003 Share Posted August 29, 2003 you may have a dampener door stuck but you need to read tehdisplay to check it to read the display you usually need ot heat it with a hair dryer then there is a self diagnostic procedure to get fault codes do a search if you can get the screen to work for the codes and how to retirve them Quote Link to comment Share on other sites More sharing options...
rudeboy Posted September 2, 2003 Author Share Posted September 2, 2003 I tried pressing the auto button and lower the temp, It didn't work, thanks anyway. SKPerformance, I can't find the self diagnostic procedure, can you please send me the link. Thanks Quote Link to comment Share on other sites More sharing options...
SKperformance Posted September 2, 2003 Share Posted September 2, 2003 it is in the general maintance section for the a/c diag Quote Link to comment Share on other sites More sharing options...
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