The car gets its usual mpg of 20 as long as the AC isn't running. With the AC running, I get something like 12-15 MPG.
I've looked for the sight glass which may help me diagnose further but I can't seem to find it. I also have the encyclopedia-type repair manual from lexus. The book tells me what different types of things to look for in the sight glass but I can't find it in the first place!!!
Also the cooling fan is always on if the AC is on and the car isn't moving. The cooling fan will go off if I turn off the AC
What is it about a faulty AC that burns up so much gas?
HELP!! Thanks :)