My wifes 2009 Highlander with rear AC is not cooling properly. The lowest it will cool is 60 when on the highway, but normally it will cool to 71 or so in the front and 65 in the rear. This is all i’ve done so far and i’m about at my wits end!
I’ve replaced both explansion valves (front and rear), new drier filter, new ac suction line with inline filter. At this point the only components left to replace are the compressor and condensor. Yes, I did vacuum the system out and it holds a vacuum. Yes, I believe I am filling it with the correct amount of R134A. Please see below pictures of the gauge readings last night while it was 81 degrees. What should I replace next? A toyota tech i’ve been messaging seems to think I have a blend door issue causing heat to mix with the AC. Any help or guidance on what to do next is much appreciated! Thanks in advance!
Are you referring to weather conditions? This last charge was last night, 81 degrees, a little humid. I’m in Mississippi. A friend told me it is best to recharge the system on a hot sunny day which i’ve already done, but not with the latest part replacement, (rear expansion valve). Thanks!
I guess not. I am learning and do not know about this step. Can you elaborate? How can I do so? After vacuuming the system for at least 30 minutes I closed off the valves, then turned off the vacuum. Then I opened the low side to fill it with the gas.
No offense intended, but learning as you go is not something you want attempt when it comes to air conditioning systems in general. It has the potential to be an expensive lesson.
