Having problems with your 2003 Toyota Highlander ?

Press a/c button on dash, green light comes on,

\015 But the compressor does not engage. I have an independent service guy who has trouble-shot problem as far as he can go. Among other things he has tried was to change out relay module - didn't work. Again, green light comes on, but compressor does not engage.\015\012\015\012Note: previously had the a/c control knob/switch w/3-conductor wire-to-board problem back in winter (system was blowing hot/cold air at same time). Replaced the entire control board w/new ribbon cable & switch. Was working fine. Has nothing to do with the current problem.\015 Posted / edited by AnonymousUser on : 20-01-2020

Answers :

Good afternoon and welcome to fixya.
\015\012just curious this may sound like dumb question but is the freon level at the proper lb level? yes i know you probably already checked this but need to ask anyways, have to start somewhere. next is there any little particles of metal shavings between the compressor and ac clutch where the two bolt together? you could have bad compressor or clutch. if all of this has been checked then need to add ac dye to system and blow through with compressed air. make sure that freon is flowing through the accumulator and the compressor head properly and through system. be careful not to put to much pressure in system, you may just have a clog line or evaporator coil and a good draining, vacuuming and cleaning of system may take care of it. you did mention the relay was changed also, after being changed was the volts and resistence checked to make sure that they are within limits? could be faulty wiring going to relay. here are a few ideas let me know where we are so i can help you more if needed, we needed to start somewhere so if you have already tried all of these then my apologizes and let me know so we can move forward. thank you for using fixya and please rate my solution. let me know what your outcome is so we can get you cool.
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Repair Help & Product Troubleshooting for 2003 Toyota Highlander

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